ive been urinating a lot and i dont no whats wrong?

i have been urniating a lot for the past 6 months, i always feel like its burning down there, i have been to the doctors and i have done every std test, but the results were all negative, wat could it be? pls help, i also may have hpv, Genital Warts, the doctor used the liquid nitrogen twice but the warts didnt fully go away, can the warts be the reason why im urinating a lot