Low self esteem or something more?

I have extremely deep insecurities about the way I look
I can't leave the house without having washed my hair/done my makeup
I will skip school if I feel like I can't go out because of my face
I will constantly reapply my makeup- sometimes making me late for school/skip school
However, I'm not always unsatisfied about the way I look
I'm always running late for school because I have to constantly check my makeup
I hate bright lights and I avoid all places with bright lights
I check mirrors pretty constantly and I sometimes even wake up at night to do so
I don't spend very long at mirrors however.
I don't look at mirrors in public when there are people around me. I feel like it'll make them scrutinise me
I'm always wishing for things like better skin and a prettier face
I used to pick at my skin with scissors
There was a period of time where I would cover my nose with a bandaid, telling people I had tripped whereas I was just extremely frustrated with the way my skin/nose looked
I avoid cameras and I often think about rhinoplasty and chemical peels and whatnot

I've just started seeing a psychologist (about my phobias)
We discussed my phobias and my other anxieties and how I deal with stress
We briefly talked about my confidence levels in the way I looked but we didn't go in depth about this and I only told her about having to apply makeup and my concerns that my Mum would stop buying me makeup
She just told me that I had these anxieties because I'm a teenager and I care about the way I look, which I don't disagree with

But recently, I heard about something called Body Dysmorphic Disorder
I can relate to a lot of it and I was just wondering if I have it? Or if it is just really low self esteem/a problem related to adoloscence.

Thanks!