Appearance of such symptoms that long after exposure almost certainly means it isn't an STD. Maybe pearly penile papules, which are a normal anatomic variant (usually not red, however); or, if only 2 bumps, on on each side of the urethral opening, maybe prominent Tyson's glands. It doesn't sound like herpes or any other STD.
The standard advice applies: See a health care provider.
Best wishes-- HHH, MD
They are at the base of the head and are like raised patch's in clusters of three roughly speaking.