Autism anyone else have a baby on the spectrum?

Pauline

So I'm currently 21 weeks with my fifth baby my fourth was born autistic shes amazing nonverbal however I'm currently taking classes for summer to learn sign to teach her to speak I'm constantly feel like Iam failing when she has a melt down witch is probably like 3-4 times a day at least xat night around 1am then again at 3am at least 2 during the day otherwise shes constantly laughing smiling I feel so guilty like I did this to her it makes me cry so much of course when shes not around does anyone else have a child on the spectrum ? If so how do you deal with the meltdowns ?