What can I do to fix my hair? *long*

Me

So I have struggled off and on with my hair and it go much better and was growing and was doing really good. I’ve been natural for 3 years and in 2016 I got a rinse and had my hair colored red. Things were great for awhile, I got a little bit of damage as a result but everything else was fine until now. I moved 5 hours away from my home for school in August of last year and had my hair braided up until October. Instead of seeing my regular stylist I saw someone else and should have immediately walk out after the first incident but I didn’t. Anyways I got some reason didn’t have any brushes so after I took my hair down, I wasn’t able to properly detangle my hair but I just shrugged it off and threw it up in a pony tail thinking that the stylist would be able to fix it. I get there and she washes my hair and then tells me to sit under one of the dryers and hands me a comb telling me to comb through it every couple minutes. Now this is where I should have walked out or at least said something but I didn’t. She comes back after an hour or so and sits me in her chair. She tries brushing through it and then uses a pressing comb to get to straight and then uses a straightener. Fast forward to now I have lost a ton of hair and was told by my regular lady that this woman messed my hair up and I now have scarring and marks from the hot comb. She trimmed my hair and it’s now above my ears which I was a little embarrassed as I didn’t like it but I’m coming around to it. My mom was saying that it would be best to get a little more cut off but I know I wouldn’t feel comfortable with my hair being that short. I will be getting braids again next month but is there anything else I can do to help stimulate hair growth and to repair the damage done to my hair other than cutting it and starting over?