Struggled with depression for years. Stopped meds during pregnancy and coping is difficult

I have bipolar depression and struggled for years but got it under control the last 2 years when I sought help and finally started to take meds. My husband and I planned this pregnancy and I talked with my doctors before and did extensive research and opted to taper off the meds and stopped taking them when I was 6 weeks pregnant. I have been ok since then but I am 20 weeks now and the last month the symptoms have been slowly building up. I'm hitting a point where I'm having a hard time getting out of bed every day and just generally not motivated to do anything or go to work beyond normal pregnancy symptoms as well as feeling general sense of irritability and anxiety. Just looking for other moms going through Similar and how they pushed through. I really dont want to get back on my meds until after the pregnancy and I was really hoping to breast feed for a significant period of time but not sure I'll be able to if I cant take my meds after birth.