Pregnancy and Depression

Just wondering if any of you other mommies-to-be have experienced severe depression while pregnant? I suffer from depression and anxiety pre-pregnancy, but have been feeling great with no episodes until a couple weeks ago (around 24/25 weeks). Now I've been caught in this major depressive slump and I'm having a hard time coping. I was wondering if anyone else has experienced something similar and how you managed to deal with it. Any insight you might have would be helpful!