Needing Positive Support

Michelle
So I've started my second pregnancy. My first ended in July at 9.5 weeks. I went in to the doctor to hear my baby's heartbeat for the first time to find out my baby's heart had stopped and I'd had a missed miscarriage. 
We recently found out we were expecting again. Instead of excitement I balled out of terror. A day later I started bleeding and due to low Hcg and progesterone levels my doctor told me I'd had a chemical pregnancy and miscarried. To everyone's surprise my Hcg levels and progesterone kept rising. The doctor said We have a little Christmas miracle and I've been put on progesterone supplements. 
I'm so scared. Scared to move, walk, do anything really. I can't even bring myself to open these apps and follow the progress. Scared I'll get my hopes up again. Terrified I'm going to go in for the 7 week check up and it won't be there or it's heart will have stopped again. I know I can't go through this whole pregnancy like this. 
Any similar stories and words of hope and positivity from you all would be greatly appreciated. Really needing the support of other women.