Anxiety , Miscarriages

I have had 4 successful pregnancies all back to back. So i don’t understand why I have had 3 miscarriages since 2017. My last one was oct 2019. Im currently 6w2d pregnant and Im mortified. Any little cramp or pain sends me to a panic attack. All I want is this baby to pull through 😔 anyone else have had a similar experience and has had their rainbow baby ?