I used to get suicidal two days before my period. It took me a while to figure out that many of my most severe suicidal thoughts were linked to my cycle.

My ob/gyn worked with my pdoc to prescribe a low-dose hormone (yasmin birth control pills). I take them continuously--meaning steady hormones and no periods. This has had a huge impact on my mood stability (diagnosed BPII). In fact, this has improved my life more than all of my other meds combined!

I'd highly recommend at least looking into hormone treatment rather than adding an AD. I wish I had known about the connection sooner.