My research is telling me this is not serious, please help

I had unprotected sex within the last 3-4 weeks. She has been tested since & everything is clean. I noticed this when masturbating, felt a small, hard 'pimple' type of 'dot' on my penis head. All of my research on google (which is terrifying) leads back to something like balantisis or possibly molluscum (forgive my spelling) - and NOT an STI... Here is photo - again, so small, not even 'hard' unless moisturized, doesnt hurt at all, no discharges of any kind etc...it almost looks to disappear when I take a hot shower. Yes I have been cleaning myself with minimal soap and using clean towels since etc etc... Anyone with insight please on this ONE small red spot?

image

Thanks