Really concerned and confused about possible std

[james22221331]

I went to a escort around two months ago. A week or two later I realised these small genital wart like growths on my shaft. Once these went, there was a single sore on my Pubic area it itched quite a lot then went away on its own. Was thinking it was Herpes. Now around 6 weeks on, my back has been aching a lot and so has my stomach I now have these bite on my arms which you can squeeze almost like blisters. I tested negative for syhpilis and HIV. Just confused as to what it could be as they don’t itch.

Please need some help

Thank you!