Birth defects

How do you keep yourself from worrying about birth defects. This is my second pregnancy first born is perfectly healthy but I’m so scared of the what ifs now. So far only think I have done differently this time is not starting a prenatal sooner or taking folic acid. I’m currently 7 weeks and I can’t help but feel guilty what if that would’ve been what helped this baby. Sorry my mind is racing and hoping someone else feels the same