Have you ever been tested in the past? Has he? If you have past negative results, then you know that this infection is new.
I have to say that while its possible this could have been from before you were married, I'd really doubt it. I could see one of you not having symptoms for this long, but not both of you.
Have you all been sexually active during the treatment? That could explain why he is continuing to get this, unless he's having sex