



i suggest u visit a doctor many things can cause that stds aswel as soaps and some skin conditions difficult to diagnose looking at it but given the fact u have had it for a week and it started after sex u need to go have a test for all stds
stds such as chlamydia and gono can also effect the urethra and give silmilar symtoms to that of a uti such as pain / burning when urinating and testicle pain if u had those symptoms tho u usually get a discharge from the penis thats white cloudy or thick yellow so i would keep an eye on it until u visit a doctor