Sheltergrandie

I was banded on August 6, 2008. I have lost 20 pounds since I began the pre-band diet, so I feel it is slow. My third fill is finally giving me good restriction. Recently some foods, even when chewed well, make me feel extremely sick, with pain like sensation that radiates into my jaw. I have vomited a few times like I have a virus. Afterward, I feel better. Is this a normal feeling when blocked? Also, what does "PB" mean, and is the very thick mucus normal when something is blocked?? Thanks.