I need your two cents!

Ok ladies!

Am I over reacting on the following story?!?

I recently found out that my husband is texting this female he used to “mess” with before we got together/married etc.. the message I saw was quite disturbing…(he texted, “I can’t get what we did in the car out my head”) but he claims that it happened wayyy before we met. And at this point, I don’t trust what he is telling me. We have a child together and at this point I feel so hurt and my trust is just fucked up at this point I feel like. What are your tips/advice on something like this?