Negative thoughts

Hi mommies, I hope as I type this message and seek advice. I hope I don’t get judge. Is it normal to over think and have worries for the baby in the stomach? I feel so bad like I worry about birth defect, adhd etc .. , it’s like as if I am cursing my baby and yet at the same time anything I see or story I hear can trigger me to overthink which I find it so scary. I don’t know what to do.. I feel so sorry to my baby as though I am cursing my baby (it’s the last thing I would ever want to but I am feeling so terrible to overthink)