Miscarriage help

It’s been three weeks since I lost my baby. They estimated that I was between 13-15 weeks. It’s been really hard for me and I’ve barely left the house. My mom was never supportive of my pregnancy and told me multiple times that I should’ve had an abortion while I was pregnant. When I had my miscarriage didn’t seem disappointed or hurt at all. She told me a couple days ago that I shouldn’t be hurting anymore and that “I should just be over it by now” she also keeps making comments that “I missed a bullet and that I should be happy” all these things just make me hurt more. I’ve been so depressed that I just stay in bed and sleep all day. How do I heal mentally and emotionally? Should I be over it? What should I do? I’m so confused and hurt. I just keep thinking that maybe God took my baby because I’m not a good mommy. Somebody please help me. I just want to smile again.