If you had sex with a woman and you are a woman then you are either bi or lesbian...there are different levels of sexuality. Check out this link.
http://gaylife.about.com/cs/gay101/a/kinse y.htm

It depends on how you feel you could be bi which is abit of both, for example I am more attracted to woman but the odd guy will catch my eye so I say Im predominatly gay although bi technically.

If that makes sense, in your case you could be either!

I love Kinsleys research, I think he makes a great point but woman are more open about it would like to meet a guys who is as open about thoughts or inclinations. In the sense of straight men thinking about other men!

true...women dont live on the down low like "straight" men...men have a lot of hang ups in general , especially the so called "straight" man.

you know, just cuz you have had sex with women, doesn't mean you are lesbian or bi. If you feel romantically attracted to them yeah, there is a possibility. but if you don't maybe you just like to have fun, either way it's still ok! :]

if you have feelings for both men and women, you are bisexual; plain & simple.
I am myself, so i would know