I'm not sure why your doc wants you to wait that long, did you ask? I know I have trouble sometimes waiting 30 minutes. My Nut (nutritionist) said 20-30 min. I'm at 14 weeks now and will take a sip of tea or water when I'm thirsty regardless. If I just take a small sip and then wait about 5 minutes I'm ok. But at 2 1/2weeks I would have had a hard time doing this. Part of this journey is all about rediscovering your body. The doctor, nut, and fellow travelers are all here to help, but you ultimately are the one who knows your body best and how it feels after you do something to it. My best advice is take it slow and listen to your body. Protein and fluids are the two best things to put into your body. Movement is the best thing you can do for your body. Even if it is just moving in place, shaking your booty, or swing your arms, it all helps.
Just remember to have fun and smile as much as you can, it heals your body when you do this and those around you will feel better too.