AIO Girlfriend stayed out

Last night my girlfriend and I went out for drinks with friends. We were both in agreement of leaving early as I have work early in the morning. She told me we were going to have a great night and stay on the same page. Eventually, I said it was time to go. She said she wanted to continue having a fun night. We all left together to drop me off and I let her and our friends go back out for more fun. I expected her home around bar time, which is 2 A.M. but I woke up at 2:45 A.M. to hours of no messages from her or my friends and her not home. I called her and she told me she was somewhere other than what her shared location said. She then said they were on their way back and would be home shortly. A whole hour and 15 minutes went by and they all came stumbling in after I sat up all night waiting before my early morning shift. They all say nothing happened, they were safe and just continuing to have a good night. I am just upset because my girlfriend hadn't kept me updated at all, was worried because of her friends message me saying she was upset, and I have no clue about what happened. Am I overreacting?

P.S. this is a throw away account and my first post on reddit. Just needed to vent and get it off my chest. Shes going to wake up soon and would like to know if I should stand my ground, or if I should let it be if nothing truly happened