the pill and depression

I've been on the pill for almost two years now. My SO and I also use condoms. I like to be extra safe. But emotionally, i know the pill has made me extremely short tempered, mood swingy, emotional, anxious, and every now and then I get random moments where I just feel depressed and helpless.... I just cry. I'm too scared to get off the pill. I can't risk the pregnancy... what do I do?