HELP!!

I’ve been having these gross, itchy, pimple-like bumps flare up periodically since April! I cannot get them to go away. I’ve been to the doctor on two occasions since then, where they prescribed a cream that didn’t work, and then a folliculitis antibiotic that also didn’t work. I have tried using retinol, which calms the bumps, but does nothing for the redness. Any tips/ideas on what this may be? I’d really like to be able to wear shirts other than turtlenecks soon LOL