Depression

I'm 15 weeks and a couple weeks ago it started. There is at least 1 day per week where I just can't get out of bed, all I do is cry, feel like a complete loser, don't want to do anything. My husband has been great trying to help, but I just don't know what to do. Is it the hormones? Or should I talk to my
Midwife about it? All the women in my mothers family suffered from post-partum depression. My great great grandma actually committed suicide in one of her lows. I'm scared this is going to follow me all the way through. Anyone have advice or experience with this?