Maybe you have been turning something over about your gender for a long time and never said it out loud. Maybe you said it once and it did not go well. Or maybe there is no big revelation at all, just a quiet, persistent sense that something does not fit.
You do not need the right words for it before you start. Online gender identity counselling is a private, confidential space to talk about how you feel, with someone who will not be startled by it.
The work is led by you. Nobody will push you towards a label, a coming out conversation, or any decision about your body. If you want to sit with uncertainty for a while, that is a legitimate use of the time.