AIO girlfriend is basically saying she don’t trust me because I grabbed my phone

My girlfriend came over to my house and was waiting for me to get off work, were just messing around wrestling with each other and being goofy having a good time.

Then she grabbed my phone from across the bed, and put it under her back and me playing around I rolled her over grabbed my phone and just put it back across the bed and continued to just mess around. Then her demeanor just changed and she got all quiet and said “I’m leaving”

Then she texted me this after I asked her if she was mad, she responded the next day (this morning)

I guess I’m just super confused, I just go to work then come home and usual play ps5 or something, or go to the gym. I have 1 friend other than my girlfriend I have never given her a reason not to trust me, she’s just been acting weird getting mad at me over little things the last few months

Am I overreacting?