The risks are pretty much Gonorrhea or Herpes, but 1-day is probably too fast for something to show physical symptoms. It is probably strep.
I guess i didnt explain it clear enough, sorry....um ok about what happened the other day, the time my best friend and i had oral sex,(it was her first time doing anything sexual) i ejaculated in her mouth. as i said before, she had a red patch in her mouth, but now, today 2/26/08, its spread a little more, im taking her to the doctor today..but still, is whats happening to her throat, a result of me ejaculating in her?
Frankly, she is the one that needs to go for testing immediately. It could be a variety of things, for example strep throat.
It is unlikely that the infection came from you.
Typically the only oral STDs are Gonorrhea, Herpes, or another bacteria infection. You should be tested for those. It is not likely that either would show up on the same day.
If you develop lesions (i.e. red bumps that be come open sores), then you are probably infected with Herpes. This would happen in 5-15 days. Go to the doctor immediately if this happens. However, it may take 3-4 months to show up on a blood test.
If you develop burning and discharge, you may be infected with Gonorrhea or another bacteria. In general, you should probably go back to the doctor in 3-5 days to get screened again.