What age did you get/will you get your first bra?

I hit puberty at 8 and was comfortable with training bras til the age of 11, thats when my back started hurting and i couldnt run or lay down without my breasts hurting. My mom refuses to get me a bra and I was only able to convince her to start letting me wear padded training bras a few months ago. She says I'm too young for a bra😭🙏