So, I am really lost, I think I cheated on my wife...or did I?
Do you think it could have been a dream?
I was happy with my wife but I may have cheated.
It's never good to cheat, but you need to determine if what you did was that or not, by not just your standards but your wife as well. Cheating as you seem to know, is not good and you need to talk to her soon.
I hear you but I need to know for myself if I cheated or not.
Find out if you did, but still then share what happened your partner. They need to know too.