First, let me say, You Have US. We're here for you and what you're experiencing has been experienced by others. You can scroll through years and years of posts and find people with similar challenges.
I lost 115 pounds and believe me, there was sagging where I'd never sagged before. But check out the post-op photo I've attached below. That's my "after" photo, and even if you can't see the doughy flesh and sagging that IS THERE, I wouldn't trade my new body for my old one for any reason. I'm 16 years out from my surgery and muscles and fat have shifted around, but compared to what I looked like at my highest weight, I couldn't care less. I was 57 years old in that photo and never felt stronger or younger.
I'm 72 now and I still have that outfit and can still wear it, though there's some added jiggle and obviously I look older, but I'd have the surgery again and again to get there. I'll post another picture after this post to show you how I used to look.
Your doctor is right, though maybe not about walking more. I joined the YMCA and it became part of my day 6 times a week. I learned to swim. I walked the treadmills. I did light weightlifting. I've had ulcers and nausea during parts of my life, but I did what my doctor said, took the necessary medications, and over time, because I added movement, things got a lot better. I don't know what can be done for dairy allergy, but I know gastroparesis can be treated.
If you gained 10 pounds in a week, you must have been eating a lot of food. That's science. No way do you gain 10 pounds a week as a result of gastric bypass surgery. Start keeping a journal and write down every single crumb or slurp you put into your body. Be HONEST. If you actually weigh 10 pounds more after a week, you either have a serious medical condition or you're eating a lot of food.
And one of the most intense, powerful symptoms of obesity is a self-loathing eating disorder. I've got THAT, too. For that matter, anger is a powerful enemy. In AA, drunks say, "I'm so mad, I'm gonna drink AT you." Well, we eat at people or frustrations or messages or disappointment or loss or a million other emotions. That comes from a deep-seated self of inferiority or a response to abuse or other self-destructive behaviors that are TRYING TO MAKE YOU FAIL, so you can live up to some negative message that was probably planted there by a parent, or abuse, rape, violence, being robbed, or constant brainwashing that told you you're not good enough & never will be. For whatever reason, these attacks on our beautiful, pure souls manage to get through to our belief about who we are. You weren't born with them, but you've been trained to hate yourself on some level, for some reason. You don't deserve to be treated like that.
And some people, like me, are unable to see their true reflections in a mirror. This is called Body Dysmorphic Disorder, where you just cannot see your true size, and/or see a hugely obese person when you're actually skinny.
There's so much more I wish I could tell you, but let me make a suggestion instead. There's a book I recommend passionately called The Only Diet There Is. It's not a food diet book; it's a diet from negative thinking. It helps you develop affirmations and you can use an affirmation anytime a negative though pops into your head. The trick is repeating the affirmation over and over, as many times as you need to, until the negative thought can't be heard anymore. One of my affirmations was, "Everything I eat turns to health and beauty." Try it. Say it until the negative thought goes away. Just as negative thoughts about what a failure you are will help you keep failing, positive thoughts will help you believe in yourself.
You are a work in progress. We ALL ARE. You're born innocent and (we hope) without cruel thoughts being thrown at you. But then, it seems everyone has an opinion about you, and attack you with the negative ones. One time when I was still obese, I was crossing the street in front of this pickup truck full of boys and they MOOOOOOOED at me, laughing their asses off when I burst into tears. At the time, it really hurt, and for a long time afterward. Now, I just tell it as a story and it doesn't hurt me. Obviously, there was something really wrong with those boys.
Here's my photo a year after RYGB surgery:
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And just to simplify things, here's my photo before RYGB:
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There was a time when I couldn't look at that photo. Now I'm SO GLAD I have it.
Smile. Cry. Read that book I mentioned. It's online in PDF format so you don't even have to buy it. Write yourself some affirmations, as a love letter to yourself. You're beautiful. Tell yourself that.
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Thank you for trusting us with your story and sharing your frustrations. Now, please try to trust yourself and share love with your body and soul.