Bipolar disorder and birth control

My mood swings get really really bad when I'm on my period and right before it starts. Last time I was on birth control I rarely got my period but I also had an eating disorder that continued to stop my period even after stopping birth control. I had stopped the birth control before I became properly diagnosed and medicated and I can't remember how it felt before. I'm just wondering if anyone on here is bipolar and I'm birth control and how it makes them feel. I'm sorry if that was wasn't articulated clearly.