I know JUST what your going through!! I'm 18 & have been transitioning since March 10, my mom tried to make me get a relaxer the beginning of this month & I finally told her I was going natural & never getting a perm AGAIN.
Well I ended up getting cornered in the bathroom with her cursing me out & she wouldn't let me get a SINGLE word in, the only thing I got to say was "remember Good Hair by Chris Rock!"
In the end when she ran out of breath from screaming she said F it & I can just walk around w "nappy" hair.
It's the end of the month now & she's still mad at me, but has said my hair does look nice & it's getting longer.
So just stand up for what YOU want to do to YOUR hair & don't let others try to talk you out of it ;D