Miscarriage fear for the worst 🤦🏼‍♀️

Iv had a missed miscarriage, the baby just stopped growing..my bf and I tried to conceive immediately after because of the loss I was hurting so bad (I was 17 at the time) I was pregnant again but because of complications I had to abort the baby (still miss him/her) all this happened 3 years ago..today I am 20 years old,married and 6 weeks 4 days pregnant..I have this fear of losing my child iv been delaying scan appointments because I don't want to give my hopes up, checking for symptoms every 5 mins and googling "how do I know my baby is still alive" everyday😞 I can't take this paranoia anymore,any advice?