Ooooh yeah, I felt that way too....except in my generation transgenderness wasn't even a thing yet. I kept getting told that "you're a boy, you have a penis and its JUST NOT RIGHT for one to (insert criticism here--walk like a girl, talk like a girl, sit to pee, etc).
So I spent my youth and most of my adult life suppressing everything that I feared might be "girly", and at the same time trying to be as manly as possible, and convincing myself that "yes, I are a man...a MAN, dammit!" while thinking "I hope they believe me..."
Well...I did until I started having panic attacks and then several months of therapy. Once I accepted that I was trans and overcame my fears of my childhood beatings, I simply dropped all MANnerisms and was able to be just myself.
And OMG it was--and still is--wonderful.