How long do I give him?

My fiancé/sons father and I decided to give eachother space after a (unnecessary) fight...We haven't talked since Saturday night which didn't go well...he said a lot of things that hurt and upset me and instead of me keeping quiet like normal I talked right back. He said it was over and I was dead to him and we needed to leave. So I called his mom to see if I could stay with her(bc my mom knows nothing about us having problems and his mom knows hes easily angered and gets out of hand) she said yes so I left. He hasn't tried to contact me at all....I sent a message just saying whenever he's ready I'm here...but how long do I wait? It's killing me and taking ever bit of me not to blow him up!😒