How to make a girl stop being mad at you?

kk, here is the thing. I went to dinner last night with a girl (i like her and she knows) and her family (with my fam to) and she got really mad at me cuz I found out bout her past relationships. I keep trying to text her and she won't respond. We r startin school next week and she is in 1 of my cles, maybe 2. should i give her some time, or what.