Bump on my on mushroom. Syphilis?

I had someone perform unprotected oral sex on me. 2 months later a bump appears. I suspect syphilis but im not too sure. And no there are no other bumps. Also no itching or burning on the genitals.

(Beginning) https://ibb.co/fPmDMp

(Later that night) https://ibb.co/fCuiMp

(Now) https://ibb.co/kD3A1p