Please could I have help...?

So I was texting my girlfriend and we were having a joke around... I should probably mention we had an argument about cheating a few days ago... and anyway we were joking around so I wanted to call her to just hear her voice, you know when you love someone so much you want to listen to them, and I asked and she said... well just read it. 

Please could I have advice because I don't know if I'm overreacting or not... and I'm scared to be honest

The blanked out bits are just her name.