Can I call my ex? Feeling extremely depressed.

I was recently diagnosed with depression and this is the worst day. I’m getting worse and worse and today I’ve never truly thought about siixide but al I could think about was how easy it would be to sit in my car in my garage and just fall asleep and pass away. My moms not home and I don’t feel comfortable talking to her. O just want to talk to him. He said he’s always there to talk but I think he has depression too and I don’t want to make things worse for him. He broke up with me 3 weeks ago. I don’t know what to do. Everyone said I should not reach out for a couple of months but I have no one to talk to. I hope to maybe someday reconnect when we’re both better but will calling him mess things up??