Aversions symptoms and conditions

Although this isn't a side effect I wasn't quite sure where to post it... But my question is: Do you know anyone or did you get pregnant while using the Yasmin birth control pill? I know that these pills make your body think it's pregnant but I think I may actually be pregnant. Although I don't "feel" pregnant my body sure is acting like it is, I.E. sore breasts, weird cravings and aversions to food, headaches, very tired, very hungry etc. Has anyone had these side effects too and you weren't pregnant? Thanks!

My 9 year old son started Singulair 5mg about 8 months ago. Shortly after, he started to occasionally complain of stomach pain and not being hungry. About 2 months ago, they changed the dosage to 10mg. He now has chronic diarrhea and severe weight loss. We stopped the medicine about 2 weeks ago, but he's not "back to normal" yet. He's never had any digestive problems before. The doctor's recommending endoscopes, and we're at our wit's end.