Hi and welcome! There is a "dieting with obstacles" section here:
http://www.3fatchicks.com/forum/dieting-obstacles-14/ so you are not alone!
I personally have several issues, including hip injuy, weak ankles, fibromyalgia.
Some of the tips I can give you are:
Make sure you drink your 64 ounces of water a day. I do 16 ounces before each meal, and then as needed drink the rest.
Visit this forum for support! Everyone here has been awesome, helpful, motivating and encouraging!
Go to
http://www.myfitnesspal.com and sign up, or with a similar program to make it easy for you to log your exercise, food and water intake.
Glad to see you here!