Was I wrong for saying to my ex right now I need some time alone?

[youdontneedtono]

Me and my ex have been broken up for maybe about for weeks now. we have still been talking mainly because we have a baby together. she just started talking to another guy. And with me still having feelings for her I was not ready to here that. she told me after we spoke on the phone last night she went back to see him. this morning I was feeling really hurt that she Hide that from me an I told her I need some time alone right now. but call me to night to talk. she got very upset with me and has now blocked my number.

[Drumlin2001]

I'd be super pissed if my ex were taking my kids to meet someone she barely knew.
She seems conflicted in how she's feeling. I'm sure there's many more messages. She'll have to unblock you at some point as you'll need to communicate over your child