I think my mom is on drugs.. Help?

Hey there, I know this is a odd place to come to. I am getting extremely worried for my siblings safety, and my moms in all. I have known for awhile she has sold pills, but she always told me it was just a little extra money-- I of course had no say, and just let her do so. She even told me she rarely took any of her prescription.

Then I am becoming confused you see? she has lost over 100 pounds, she falls asleep while driving, refuses and I mean absolutely never wears short sleeves. She is very explosive, slammed my head against a tub, ripped my hair out, called me names-- when she is mad there is no stopping, it is just the sudden outbursts. I of course have an attitude some days, and she will have no reaction.

she is always picking at her face not like you would typically think always shoving needles in her face 'lancer' ones to release them anyways, her face is covered with marks. Recently while my dad goes to work he has chosen to leave my brother at home with my mother because she does not have a job, and my brother had recently got kicked out.

He is only 3, she constantly locks the bathroom door during the day leaving him to roam everywhere by himself! I will come home and he will just be running around, she always keeps the bathroom locked-- yells at all of us when we try to get in.. Also she refuses to get rid of this friend that has been staying with us I found out of their 'affair' whatever you call it awhile back, and they told me it was a joke..

but today they had been out for sure on another 'pill run' I am the only one who knows of that by the way.. I snooped around and found a shirt of hers with blood coating the arms inside of her shirt? then I looked over and found love notes from her 'friend' .. beside the tub was a mountain dew can cut straight down the middle.. she is lying about so much, I haven't even touched on the half of it.

What is going on??