I saw a new acronym, which I just can't remember for the life of me and couldn't turn up in a Google search.
Anyway, what was notable about it is that it switched from focusing on what people "are" (LGBT etc.) and instead focused on tolerance.
Part of the thinking there is that while some people definitely fit within a certain label and stay there, others don't and/ or don't want a label.
The point is not to identify who you will be attracted to for the rest of your life, but that no matter who you are attracted to (within usual consenting adult categories), you should receive the same treatment and be equally free from discrimination.
The relevance here is that if you're not sure, you're not sure. It can be useful for people to pick a label/ category if it fits, but that doesn't mean everyone needs to do that. You can focus on the individual person you are attracted to for whatever reason, with no label. (Or you can choose "pansexual" or one of the other more all-encompassing labels if that works better for you.)