Severe anxiety/guilt over preemie

I have 2 babies. My first was born at 39+3 so he was full term. The second I just had this past week was born at exactly 35w & I’m so depressed about it. I keep running scenarios if I could have done something differently or how it’s my fault... I did everything right. I don’t understand and then I was silly enough to google long term effects and I can’t stop crying about the possibility of my baby growing up and having the health problems later on such as learning disabilities etc... I just feel like I have failed my baby and it’s all my fault. 😔