How to get out of depression?

How to get out of depression? Nothing pleases me at all, everything annoys me, it irritates me. I feel physically awful too, unbearable pain in my hip and tailbone, even though I haven't gone for an ultrasound yet, I've read that if the bones are more than 1cm apart, then there will be KS. I cried because of this, I made myself think that suddenly I won't give birth. I can't eat everything, nausea starts. I don't know how to relax. There are also bad thoughts that suddenly a child will be born and I will be indifferent to him, it scares me very much.