What do you do if you catch your husband cheating?

You need to confront him about it and see what he has to say for himself. You might not want to hear it but it will make you feel better to know why he did it and what he was thinking. After that you need to tell him how you feel and tell him that what he did wasn't right, he might try to say that you drove him to it but remember that it is not your fault that he made a bad choice and that he cheated on you. If after you have talked with him you don't feel that the relationship is going to make it I suggest that you brake it off now and spare yourself more heart break if you do not think that things will work out. Then you just need to forget about him and move on, you can do better then him.