I went to my clinic at 12 days, they tested for everything. Neg on everything I do have a syphilis canker question. it’s now day 30, on my thigh I have a dry scaly patch about 1/4 inch. From what I understand this is not a syphilis canker. I have psoriatic arthritis. And it start as a pimple and grows in size as a scaly patch . I had the pimple close to the time of the encounter, no other signs as of today. I’m i right or should I be tested for syphilis again.
Not a dumb question, but there are no studies on this that I can find, though I'm not entirely sure what you are asking.
From receiving oral sex, you could get gonorrhea, herpes type 1 (if you don't already have it), syphilis and NGU. The most likely of these is NGU, which is an infection in your urethra and can be caused by normal mouth bacteria entering the urethra.
You can test for gonorrhea and NGU at 3-5 days.
You can test for herpes now to see if you already have type 1 - many do and most never get cold sores/oral outbreaks. If it's negative, you can test again at 4 months, but if you don't get symptoms, I wouldn't overly worry about this.
You can test for syphilis at 6 weeks, though it takes some people up to 3 months. If you don't get symptoms after 6 weeks, I wouldn't worry about it.