Depressed and pregnant

Okay, so I am excited to be pregnant again don’t get me wrong. I’m happy that I get another chance at this after we had a missed miscarriage at 11 weeks. But the thing about it is, I’m nearly 10 weeks now with our rainbow and can’t shake this feeling of grief, anxiety, and depression that I’m experiencing. I’m scared out of my mind that I’m going to miscarry again and again and again. I want to be happy and joyful for this baby, but I feel like I’m robbing myself. I don’t know if it’s just the pregnancy hormones or if I’m just an anxious mess but miscarriage is all that I can think of. Every minute of every day, I’m terrified that at anytime this baby’s heart will stop and I won’t know until our next appointment. Has anyone else experienced this? What do you do to stop the negative feelings and the constant anxiety? I’m really at a loss right now, I feel so down and useless. Any input would be gratefully appreciated.