What Causes A Vaginal Discharge With Tenderness And Odor?

The last couple of days i feel as if my body odur is different my clit is a little tender but my main problem is the discharge it doesnt smell like it normally does my height is 5.9 weight is 9stone having reg smear tests as my smear tests come back abonmal i had the last one done one month ago. have another on in september. what do i need to do