You should get this checked out since its lingering.
AJ
Hopefully it isn't a STD it appeared 12hours after sex it hasn't spread and it looks to be calming down. Just worried because its been 5days and hasn't cleared or to soon?
Non-9 causes reactions in something like 88% of people. Most experts don't even recommend using it anymore because of that.
Stop using the anti-bact soap on your genitals. That could be killing of good bacteria and causing this as well.
AJ
No STD shows up immediately after sex. I think your Doctor has the right diagnosis. I recommend that you continue his care plan. Take care.