HIV is inactivated in air so that mask is considered air contact so zero risk.
The highest probability is you have flu and got it from the mask since flu virus lives for weeks on surfaces.
Obviously nothing makes dots on your penis, scratching on your body at the same time, so likely you are over-analyzing your body in fear which is getting the better of your reasoning and making you think things exist. See your GP if you think something is wrong, but it sure isn't HIV.