Hello , I Think That I Am Having Trouble With

Hello , i think that i am having trouble with my urethra tube . I am a 18 year old female , who is sexually active ( one partner , we were both each others first and only) . Quite recently , ive been experiencing itching where i believe my urethra tube is . I am also having issues with peeing ( ill have the crazy, urgent urge to pee even minutes after i actually pee) but when i go to empty my bladder , either nothing comes out , or very , very little does . The opening itches throughout the day , and i experince very little burning , its more like a discomfort .