I wanted to tell you i have had my submissive thoughts and sexual fantasies since i was very young also (9) when i began entering puberty, and they have never once changed in 22 years so far, so to answer your question, YES, i believe you can definitely know from a young age.
i hope you find the right people with whom to explore, because it's very important. i don't find it's something i can ignore in me, although at times i thought i could.
you are who you are- be proud. stand tall as you kneel, when the time comes
by the way, i like your pretty nick.