Is it normal i forgot how to use my real voice?

This is actually not that uncommon, maybe not specifically using joke voices, but not using your own voice in general. People subconsciously talk in a different register all the time (usually lower, because we perceive low voices as powerful). Any well trained vocal coach should be able to train you to talk in your regular voice, although this sounds more like a mental issue.

Gay ppl forget their real voices too.