Bump on shaft that got smaller after a week

hey guys, i have a doctors appt within the next week, but i figured id get your opinions first. i had received oral sex from my lady and the next day i noticed a red bump pimple like thing on my shaft. everyday since then it has decreased in size but i am still a little worried about it. i am 30 years old and sexually active. I will post pics of the progression of it.

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i know its minor but i am still worried because i can slightly see it still. it has me looking at it every couple min and making me have anxiety if someone has seen this before and could help please

I think any medical professional would say 'you have nothing to be concerned about' - the more diligent ones may ask you about the nature of your sexual activity so that YOU can understand the actual level of risk that you currently have .....

thank you so much for your comment. today is the day i see the doctor also so thank you a million times for putting me at ease a little more.

Update after seeing the doctor would be helpful .....

Any update on this dude?