UTI is a common problem in young women and even more common after sex. The typical symptoms include burning with urination, frequent urination, urinary urgency (the sudden urge to go), and sometimes fever. Irritation of your urethra without an infection is also a possible cause of your symptoms. This would be the case if you are not typically sexually active. It is important to know more details about your symptoms and perform a thorough physical exam. It is possible that your UTI has not been cured completely. Consult your doctor and clarify your doubts. I hope it helps.
Best wishes and regards!
Most definitely agree with Arti Sharma comments. In addition to this you can also try showering and urinating before and after sexual intercourse. It does seem to help particularly going to the toilet post intercourse and passing urine. Also drinking Cranberry Juice has been found to help women who suffer frequent UTIs