Disabilities...

Megan • 24, have a 6 year old girl and an amazing boyfriend! Expecting #2 November of 2015!!
I don't know why I keep having these thoughts my child is going to be born with some type of "issue". It wouldn't make me love them any different..my dr didn't offer a blood test or anything yet,I'm about 15 weeks...has anyone else thought about things like this before?