Red spot on penile shaft

I had unprotected sex a week ago, and two days after I masturbated with no lube. i noticed a red spot the next day after masturbating. the spot in painless and does not itch but very alarming.File size is too big

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The photos do not show clearly what this may actually be. You need to be sure that this is not linked to the unprotected sex - go and get tested. perhaps if you went to a Sexual Health Service ask them to do a visual check rather than simply do the tests .......

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here is a better image im scheduled to get tested Wednesday

Still inconclusive - get a visual check on it ....