beyond in shock

I am beyond in shock right now.. I have had one partner, my husband, and we have been having unprotected sex for about 10 months TTC went to the doctor and found out today I have chlaymidia. Obviously I got it from my husband but the doctor said if we have been having unprotected sex that long we should have had symptoms way sooner than now and I still have no symptoms. Is he cheating?? I'm just so confused. I never thought having one partner I would ever have to worry about this. Is that why we haven't been able to conceive? I'm so upset right now.