Pre natal depression?

Jac • TTC#1 rainbow after recurrent MC. 37years old. Very low AMH level.
How do you know if you have it? I am 17 weeks and so down. All I do is cry and want to sleep, but can't. I can't get out of bed in the morning. I am over the moon at being pregnant don't get me wrong, I feel so guilty feeling this way. I moved to a different country to be with my boyfriend and haven't been able to make any friends. He goes out drinking at least once a week with work and his friends and is out till the next morning and comes back drunk and starts a fight. A family friend who was same age as me died on Thursday and I was in a terrible state. I told him I didn't want to be alone last night but he went out anyway till 2am. When I told him how hurt I was and I needed him and he choose drinking with work mates instead of coming home to me, he said I am bitter cause I have no friends. He then went out to meet a work mate for breakfast. Just miss my mum and family and friends so much. I don't know what to do.