hey, about a month ago i notices these two raised bumps/blisters appear on my penis head and consulted w a doctor. I took both a blood and urine sti test and tested negative for everything we could check, (siphilis, herpes, HIV etc...) the doctor was still unsure and proscribed me lamisil which is an anti-fungal cream. i was told to wait two weeks and that has gone by. not much change at all and i am very worried. here is a picture of the current state. any help would be appreciated thank you.
here are the pictures 