I've had sex with one men only and it's been 3 years ago. Even when I was still with him my vagina always burnt after sex. This discharging problem makes me feel so bad,I feel like I'm not normal. I have to wear line pants all the time so I won't get wet. What can I do ?

How many doctors have you gone to see? I would suggest you go see a specialist on sexually transmitted disease's, because this sounds like something you may have obtained by a sexual partner. And even though you have only had sex with one man he could have had a disease a not even of known it, the thing with STD's is they sometimes show NO symptoms what so ever. There is also a possibility this is nothing, but never take any risks when it comes to your health.