I took prozac for about 14 wks ( from my 13th week of pregnancy on) and it helped a lot. Just talk to your doc and tell him/her how you're feeling. My doc pretty much threw it at me.
It is so hard now to get medicine from your Dr because of all the lawsuits and TVs commercials about taking antidepressants while pregnant. Bottom line you need help at least while your pregnant because its only going to get worse. Ask your Dr for 10 mg prozac. My Dr research it and said it was the safest one out there for depression. Good luck