Congrats on entering Bandland
As for your diet, each doctor is different, my doctor and nutritionist did not have the same guidelines, so IMHO, stick with what your doctor tells you.
This is what I had to follow:
Week 1 and 2: Clear liquids
Week 3: Thicker liquids (no pieces)
Week 4: Mushies
Week 5: Regular Food
I would stick to the clears the first week but again, call your doctor to make sure thats what he wants. They do make a clear protein drink...can't remember the name.... Jiffy do you remember? Isopure????
I've heard this so many times where the doc's / classes / nutritionist don't go by the same guidelines.... call your doc
As for the chest pain aka gas.... WALK WALK WALK as much as you can but don't over exert yourself. Just get up every 15 minutes or so and walk around the house. Sleep in a recliner...that helped me so much. Mostly do not exercise until your doctor says you can (prob at 6 weeks) last thing you want to do is rip anything inside.
Going gentle and healing is the most important thing you can do for yourself right now... Weight loss will come...don't you worry.
This thread should help...
http://www.3fatchicks.com/forum/showthread.php?t=85115