Suffering miscarriage and mental illness together

Trigger warning for anyone going through or had a miscarriage. After 3 IUIs with donor sperm (single mom w/no infertility) I got pregnant but the fetus stopped growing at around 5 weeks and today I took cytotec and am bracing myself for a world of pain tonight.

I also suffer from bipolar 2 and borderline personality disorders but have been stable on my meds and continued therapy. So far, I’m handling it better than I thought, but I’m scared I’ll plunge into a deep depression. Is anyone going through this? My friends and family have been supportive but I work in a pediatric nursing floor with 4 other expectant moms and it’s so hard to see their joy.

I’m afraid of falling apart and letting my mental health get the best of me. I could use some helping hands.