A few concerns - please help!

I had been taking the b&p shakes and getting really bloated. After about every couple days I have a BM and then my stomach goes back down to normal, but until then, my waist size will just keep getting bigger and bigger and won't shrink at all, until I've had a BM. What does this mean and what should I do? Will this bloating go away after a while of doing the bowel cleanse?

Also.. just in general, nothing to do with the bowel cleanse.. my stomach enlargens a lot from the slightest thing I eat or drink. I can have just a small glass of water and my stomach will enlargen a noticeable amount. Does this mean my system is really backed up or something? With other people I know, after a full meal, their stomach will not enlargen the slightest bit. And, when I mention that mine does, and I mean by a lot, they think I'm crazy. Can anyone help me here? It seems as though other people's stomachs will get bigger the same way thighs do - after a while of eating bad food or too much food, fat will go to your thighs. But, with my stomach, it gets big instantaneously. PLease someone help me, I'll greatly appreciate it.