I think of sexuality the same way as I think about gender: If you ask yourself a lot if you are __ than the probability that you are __ is very high.
Most people who aren't don't spend that much time thinking about it because they have no reason to.

But you are the only one to decide, if you like to identify that way. (to your question "Is it really okay?" - yes it is.) Pick the label you feel most comftable with or non if you don't like them. Have fun exploring yourself!

(Oh and for another question that might be in your head: Yes, it's okay if your labels change. It's okay to test how you like bi and then discover later that it's not the right term. You are not fake and your identity will still be valid. We all change and esp TBGLQ+ ppl often have a harder time to discover themself)