My husband and I separated over a year ago while we not together I had a relationship... We have been back together for over a year now and he recently began having pain during urination is it possible that I contracted something a year ago and recently gave it to him?

Sure it's possible.

It's ALSO possible that he has a UTI.

BOTH of you should go to the doctor---him to a urologist to have that painful pee checked out, and BOTH of you to get tested for STDs.

It IS possible. You should have Him see a doctor and you should get checked too.

Totally possible. Time to see the doctor.