Having pelvic pain and having discharged and feels like I have to per every five sec but was tested today and no uti. What could it be?

Could be . Vaginitis (yeast infections or bacterial vaginosis, can cause these symptoms). Also, sexually transmitted infections - chlamydia, gonorrhea and /or trichomonas could be causes. Could be interstitial cystitis (inflammatory condition of the bladder, but it doesn't cause the discharge.).
GYN exam. You may need gyn exam to see pelvic organ infections vs other causes. Pid or other causes to be rule out , combined gyn exam and pelvic soon wills probably give answer.