To borrow from "The Hitchhiker's Guide to the Galaxy"....
DON'T PANIC! 
As DVD says, it's always up to you what you choose to do. If you have same-sex attractions and want to act on them, then do so. There isn't any "sex police" (at least not yet...) that is going to make you continue if you find it's not for you.
The only suggestion that I can make that isn't just re-iterating previous posts is to be honest with any potential partners. Let them know that you are just testing the water. It might not make a difference as to whether or not someone falls for you, but at least if you decide that being bisexual isn't you then you've given them fair warning.
Take care.
