It sounds a lot like gonorrhea and/or chlamydia to me. You should get tested. Are you 100% sure your partner has not stepped outside the relationship?
It is quite possible you have gotten something. burning and discharge are the two signs to look out for. best thing to do would be to see a professional and test. tell them that you are having discharge, and they may treat you on the spot. I do not want to scare you at all, but when I had chlamydia, those were my symptoms. was the sex unprotected?
Best of luck and keep us updated.