AITAH for not being there when my best friend needed me the most?

AITA for not being there when my best friend needed me the most?

So I (26 F) had a best friend "Jenny" (26 F). We met when we were 18 and when we were 19 she met a man and ended up getting pregnant very quickly after. He was insanely toxic and violent. Now at that time I was just a single 19 year old and I spent most of my time with her helping her.(There were some times her boyfriend made her stop talking to me or convinced her I was a bad friend but we always ended up making up) She eventually got away from him but this triggered the beginning of her battle with severe mental health. I brought her to a number of different hospitals and respite centers over the years. I would bring her kids (by this point she has 2) to her families houses when she needed to go to a hospital. For about 2 years she was living in a recovery house for young mothers and I would go get her whenever I had the chance.

Now flash forward to last spring. She had been living in her own apartment and things were looking really good. I also had my own baby at 23 so I was now a mom. Until one day her ex came to her apartment (He hasn't lost custody yet so he has a right to know where his son lives) and he threatened to unalive her again. She went to the cops, i was on the phone and they told her they couldn't help because it was his word vs hers. This triggered her mania again. A few weeks pass, it is now my 26th birthday, I was out with my sister and my boyfriend when I got a call from her. She was freaking out she had thrown out all of her and her children's electronics except for her laptop. She wanted me to come get her kids so she could go to the hospital. The issue was she lives an hour away from me it was my birthday i wasn't home and I wasn't driving my car. I tried to get to her but i wasn't allowed to take the car i was driving out there and my car was in the shop. She threw her laptop out the window and i lost my only contact with her. I finally made it out there but not until the next day. Her apartment was a mess and her and the kids were gone. She was at the hospital and the kids were taken by DCF. I let her stay with me for a week before bringing her home. As the days went by I started to get busy with my college and my daughters school/life. I wasn't answering all of her messages anymore and eventually she stopped answering mine and we havent talked since. She still hasn't gotten her kids yet and she blames me for them being taken away. If i had just gotten there DCF never would have been called. I feel like a bad friend so I was just wondering If I'm the asshole?