Hey,
First of the bat oral sex is not a risk for HIV so you are correct there.
Syphilis is possible but like you said low risk on the account that it’s rare expecially in women.
Chlymidia dosnt seem to like the oral cavity so is rare to get chlamydia from oral like you said.
Gonorrhoea is a likely and probably the most common STI from oral, normally however (90% + you would have started symptoms by now)
Having HSV1 will protect you against getting again, slight risk of HSV2 but very low.
HPV is as common as a cold in sexual active people you probably already have/had it and not anything to lay up at night worried about.
So all in all slim chance you picked up anything - if you want to be sure I’m afraid only way to know is to test, but, if you do you can expect negative results.