Being in the process of discovering one's sexuality is, at best, mildly confusing. I remember when I was first pondering over labels myself, wondering what would happen if I came out as just homosexual or bisexual, the latter conjuring up more positive responses in my mind. The fact I found out later down the road, even after coming out, is that it's important to dislocate yourself from these labels to better discover your sexuality for what it is.
When it comes to using labels, I don't believe that everyone is 100% homosexual, heterosexual or bisexual. Some may be, but it's more likely to me that people have something like, say, a 40% homosexual preference and a 60% heterosexual preference, or any other combination of sexualities in this percentage form. It's important to always remember to not corner yourself or box yourself up as being homosexual and that be the end of it. Life is a very changing experience, and sexuality is a part of it that can also change form as it is discovered, especially when one is first experiencing these kinds of sexual feelings.
When I first came out, I similarly labeled myself as bi because I wasn't sure if I was completely attracted to men. As a year or so passed, I grew more comfortable in saying I was more so homosexual than bisexual, and even now, I dare say my sexuality is about 99% homosexual and 1% heterosexual. Does this mean I should label myself as bisexual? No, not necessarily. To me, bisexuality would have to be more towards a 50/50 range, such as being about 45% homosexual and 55% heterosexual, or something like that. My ranges just mean that I am predominantly homosexual with the highly rare, and actually pretty random, sexual attraction to women, usually exclusive to a very similar looking kind of woman.
Hope all is well, and best of luck in discovering yourself! It's a lifelong experience, so be ready for some surprises!
And I agree with what jasmin posted: "there really is no rush." Truth stated! The more time you take in figuring yourself out, the more accurate your discoveries will be. Being hasty about these kinds of situations causes more stress, which will generally be less likely to help than calmness in your approach to your own sexuality.