Premature labor at 22

Manal
I'm very sad and devastated, I lost my twins at 22 weeks, exactly one week ago. 
My water broke and I was admitted for a week when I started to have contractions that they had to take me to the labor&delivery room. 
They said it was a high risk pregnancy,  twins and <a href="https://glowing.com/glow-fertility-program">IVF</a>, and nothing I would have done differently to prevent it but it's been eating at me rethinking my whole pregnancy what went wrong!! 
I had an ultrasound 1 day before my water broke and everything was normal! I saw their faces, tiny hands and feet💔
That was my 2nd lose, had a miscarriage at 7 weeks last year. Been straggling with infertility and I don't know if I can go through it again.. 
The past two weeks are the toughest thing  I've ever been through..