Does this look concerning?

Wednesday and Thursday i was exercising and my workout clothes kept rubbing and then this bump appeared so i assume it’s from chaffing? But it’s painful and keep rubbing against my underwear and was uncomfortable.

I tried looking on Google to see if i can find any similar pictures but then stds was popping up and made me nervous.

Does this look like it could be a std or anything? I got tested few months ago (May) and it was negative. I think it’s from exercising but i just want other opinions