I developed some lumps on the opening of the urethra 3-4 weeks after I had sex with my girlfriend

i used a condom the entire time, but i fingered her then i touched my penis. then i developed a lump on the opening of the urethra, i have no symptoms whatsoever no pain when urinating and no fever. could it be chlamydia? my girlfriend says she only had sex with me in her life. i need your help

it could be a few things visit a gum clinic and get tested most men with chlamydia dont have symptoms but when they do its usually just a drip of white or cloudy discharge of pus from the penis it can effect the urethra causing burning and pain whilst urinating plus spots can indicate many things from stds to fungal infections