Hi ! Good evening. I am Dr Shareef answering your query. In my opinion there is no point in shying away from any kind of problem if you consider it to be a problem at all. Be brave to face it solve the problem. Because of the unprotected sex, there are every chances of a UTI, a pelvic infection, and considering your delayed period an unsuspected pregnancy as well. I would like you to get examined clinically by a gynaecologist, who may go for some routine blood tests like CBC, Blood sugar, HbsAg, HIV test apart from a serum HCG estimation, a urine routine and microscopic test followed by a culture and sensitivity test if need be, and an ultrasound at the end to confirm or otherwise a suspected pregnancy or any other pathology in the pelvis. You can continue taking medicines for your flu. I hope this information will help you in solving your problem. Thanks for using healthcaremagic forum for your health query. Good luck.