hi, i am 24 years old, i noticed a lump in my left testicle when i was 19. afterwards, i went immedietely to my GP in order to know what is it as it was accompanied with a burning in the top of my penis after ejaculation, facing difficulties while urinating as well as the need to urinate frequently. i did an ultrasound and it showed that i have an epididymis. the lump by days started to get bigger and bigger, and the urinating problems comes every 6 months and last for three weeks before leaving. now im concerned as i went for a vacation to thailand last month and had protected sex with three different whores. when i came back, i had the urinating pain after masterbation and it goes gradually. however it comes back after masterbation again. three days ago, i started to feel a pain in the lump as well as the left part of my lower abdomen. there are no discharges at all. shall i be afraid of an std??
in regards to the burning problem after masturbation, i encounter this problem since my puberty nad i face it from time to time for unknown reason. please advise me as im really anxious and depressed.