urgent!!!!

I just found out my husband has been texting other women and has a dating app. I saw the convos on the app and they aren't that bad but he always asks for there number. He did state on the app how he's divorced and looking for a friend, if it turns into something more he's cool with it. What should I do? Should I text a woman and ask her what's going on? What should I say? Should I just talk to my husband about it?? He's going out of town tomorrow so idk if I want to bring it up before. (We would only be able to have like a ten min convo, if there is anything going on he would be able to delete it before I saw him again) I really want to text the girl but idk... please help...