I think i have a yeast infection but not sure. can you get a yeast infection in your mouth right after having sex and giving oral?

Yeast Infections: Nope. Oral yeast infections are rare. They are not contagious and do not usually follow a sexual encounter, especially an oral one.

Yeast infection: You can get an intraoral yeast infection, but it depends on what you mean by "right after" it does not happen immediately.

Possibly: Not immediately after. If you have a history of unprotected sex and think you have a yeast infection in your mouth, i would get tested for a sexually transmitted disease - hiv.