I have been on a low carb diet since february and have lost 35 lbs. my problem is: my stomach is starting to hurt all the time. is this because my?

While I am not: exactly sure how or why you are having frequent stomach (do you really mean abdomen?) pain, I would suspect it is due to the abrupt change in your diet. Let's say you started your diet in the middle of February: that's 10 weeks or 3.5 pounds/week.That's rapid weight loss; it may have upset your GI system. You probably need a little more fiber. Add some back in; boost your water intake.Then, to Doc