Definitely sounds like a yeast infection. Could be something else though (red spots on head?)
you can definitely transmit yeast infections onto other girls. And girls can give it to you, too, if they are having symptoms.
Most women experience yeast infections. It's not something due to sexual activity or cleanliness, but a hormonal thing. (birth control, depression can play a major role).
If it is a yeast infection, buy some plain unflavored yogurt, and let your penis soak it up for a little bit. It will help with the pain and burning majorly. It also counteracts the cultures in the yeast and makes it clear up faster
i urge you to go to your doctor. If you are responsible enough to have sex with multiple partners at this age, you should be responsible enough to go to a doctor and make sure you aren't passing something around to other girls.
And, perhaps next time, you shouldn't rush into these types of things. Sex isn't just a drunken act, it should be with someone you (if you don't love) at least care about. Meaning: you don't want to catch something from them,and you don't want to give them something. Std's are not sexy.