You are being paranoid. Of course there is a possibility. That possib lity, all things considered, is miniscule. If it makes you feel better go get tested, I am confident that if you do, the test will be negative. EWH
Thank you for the prompt reply.
What about the risk of getting an asymptomatic infection through the unprotected oral sex?
Is it possible for me to have passed my SO an infection, and her symptoms flare up before my actually flare up sometime later? (not re-infection)
Welcome to our Forum. With all due respect, I see no medical reason to try to link your partner's recent symptoms with your indiscretions. Condom protected sex and receipt of masturbation are no risk activities and if you had gotten an STI from receipt of oral sex you, not her would have almost certainly become symptomatic. Transfer of any STIs through hand to genital transfer of genital secretions is simply not a realistic concern- it does not happen.
At the time of menstruation there are a number of changes that occur within the vagina which may lead to the sort of symptoms you describe. If they do not resolve quickly your partner (not you) should seek evaluation form her Gyn. You on the other hand have no indication for concern or testing.
I hope that this comment is helpful. EWH