Reassurance

So I’ve never been an extremely anxious person but after going through infertility I have been nervous this whole pregnancy. It hasn’t been a particularly hard pregnancy, but I feel like I’m waiting for something to go wrong. Today I saw something about stillbirth being more common after doing IVF. I now can’t get out of my mind thinking “my body couldn’t get pregnant on its own, so why would it know how to sustain a pregnancy on its own?”

I know it’s irrational, but I just want to vent and say I hate how infertility has changed me to think worst case scenario and become such an anxious person. If anyone has any words of assurance/advice it would be very appreciated!