Lithium is a huge huge no for pregnancy. Especially early pregnancy it can cause heart defects. If you were trying to get pregnant you should discuss with your doc so that you could transition to a new med instead. And, it takes quite a while for lithium to fully leave your system if I remember correctly. I was off lithium for 10 months before we started trying for my youngest.

This is why it is crucial that you talk to your doctor about these things. Also research the med itself for safety and not just "meds" in general. If you just search the phrase "is lithium safe during pregnancy" you will get a lot of info on why it is not.

I hope everything turns out okay in the end.