STD test inaccurate ?

Hello all. Ok, all in all I have had two sexual partners total. One was my previous boyfriend and the other is my husband that I have been married to for over a year. Last July I went in to have my annual and pap smear as well as get tested for all STDs. Everything came back just fine, no sign of anything wrong whatsoever.

Well, a few months ago I started to have urinary discomfort(i.e burning that comes and goes, but is usually worse after sex, and increased urination) as well as a burning or painful sensation when first beginning to have sex. I DO have a problem getting moist down there, so I'm not sure if that might be why it burns and hurts during sex(this wasn't a problem until a few months ago). I have been to my doctor regularly for checkups and have had several urine tests done to test for a UTI, none was ever detected. I have noticed that the brand of condom we have been using kind of makes me itchy and it burns a bit after sex when I pee, so I am considering the fact that I might just be having a reaction to the condom and its chemicals. And I am 200% sure that my husband has stayed faithful to me so I am not even going to question that as a factor. So my question is, is it possible that the STD tests were wrong? I'm so scared. I have a doctors appointment set up next week to figure this out, but in the meantime I just want my peace of mind back.

Help?