I think your coach is nuts!!!
I also have a coach that doesn't seem to know what she is doing. I feel that she is not informed enough to give me the information I crave!! I created a binder with all the info I could find on every aspect of IP...it sure helps me when I am stumped. I think you should cut out all the restricted for for a week and up your water intake, I don't eat a lot of lettuce so I drink at least 12 - 15 glasses a day. It seems to do the trick for me, I don't eat the restricted because I am trying to go gluten free, I have on occasion tried a restricted and have found that those are the weeks when I don't seem to lose as much as the weeks when I eat a restricted. Be proud of your 19lbs and don't stress you can do it!!