Swollen sensitive penis w/ painful urination and ejaculation

[uhohspaghettioss]

I had unprotected sex with a new girl I met two weeks ago. We did so 3 times. A few days before meeting her I had protected sex with a sex worker whom I've been seeing for a while but never got anything from her.

The last time, my penis started to hurt after ejaculation.

Day 2 from symptoms onset, it got bad enough that I saw my primary doctor.

In my urine sample, there was slight blood but no bacteria nor sign of infection. She gave me the shot for gonorrhea and 7 day course of vibramycin for chalmydia. Ran gonorrhea/chlamydia test and all came out negative. Very confused.

Day 3 to 5, incredible pain urinating and tried masterbation once and was super painful that I almost cried. I have slight dribble from penis. Penis hole looks red.

Day 6, penis swells up on left side where the foreskin meets the shaft. It started out as a small lump and then got bigger. Now it's reddish and generally all swollen up. The penis looks fatter now.

Day 8, whole head of penis looks swollen. Sensitive to touch with toilet paper. It is now painful to sit down. I can feel uncomfortableness/sensitivity like to I sit down and in the general pelvic area.

Doctor changes medicine after 5 days of Vibramycin to Doxycycline Hyclate 100MG for general bacterial infection. She says prostate might be infected even tho bacteria didn't at least initially show up on tests.

I am worried. Hope it's not herpes - no skin lesions anywhere. It's weird that I'm being affected in the entire pelvic region. I wonder if it's some sort of prostatitis infection. Also read that some nerve in the pelvic region can get infected by HPV that can do something like this? I'm quite worried. It's been over a week now and my symptoms have only gotten worse.

Please help with any information.