Acne causing low self-esteem.

I am suffering so bad with my acne that I just want to hide in my room and never leave. 
It's got so bad that I am in constant pain and just want to die. 
I don't know what to do anymore. 
I've recently gone back on the pill as it controls my skin brilliantly, but it has yet to kick in and I feel like my skin is only getting more painful. 
I drink so much water it's unreal, I've been using gentle face scrubs and keep my face moisturised, but my skin is bouncing between being so dry it peels or being so oily it drips. 
I don't know what to do to help me feel better about myself, it's not just on my face it's all over my back and chest. It's boiling hot outside and I can't find it in myself to wear anything new but hoodies. 
My mum is giving me so much hassle because she doesn't understand why I'm hiding myself, I don't know how to love myself when I know how hidious I am. 
I don't know what to do anymore.