Are they generic or name brand? I was nuts on generics, but ok when I switched back to my name-brand. My gyn said "Yep, that sure could happen." If not, ask your dr to try another brand. I've found that some make me nuts and some don't. Or as my gyn said "that's why I have so many to choose from..."
edited after goofygirl's post: Yep, the right one, and I call 'em my happy pills!!! I can tell right away if I forget to take mine in the am.