i have no idea if this is the place to post this but i really need help and advice so please read this and help me out.

i am 17 and currently 30 weeks pregnant i live with both my parents and my older brother (half brother from my mom’s side) anyways this morning my brother told me something i never wanted to know, a family secret withheld from me for years a couple of years ago my dad admitted to my mom to doing drugs i was not told about this but thinking about it, his actions from the past make sense. he is an alcoholic who used to abuse my mom physically, mentally & emotionally, he abused me mentally & emotionally that caused me to go into an awful depression & go into therapy and in the past months since being pregnant i have been feeling a lot better. however, with finding out about his past drug issue i was told that he is once again doing, nobody knows how long but my mom found a pill bottle with something in it, when my brother went to look at it he discovered it’s crystal meth..i am not supposed to know my brother told me because he knows this is my dad and this is something i need to know since i would be leaving here with my daughter. i looked for the pill bottle and saw it with my own eyes so i know it’s not a lie, now i have no idea what i am supposed to do, i don’t want my brother to get into problems for telling me and im honestly so scared. my mom told my brother she will confront him today and if it gets bad my brother is taking me away so i’m not around any of this because the main priority is the baby in my stomach who i need to be healthy. i am so scared and really need support and advice about how to handle it please, i feel like my life is falling apart and i have to be strong for my baby. there’s so much going on right now and im not putting an excuse for my dad but i know how much stress he’s currently under and by no means does that mean drugs are the answer and if he’s actually on them as soon as i’m able to move out i will kick him out of my life so my daughter is never exposed to that but right now what am i supposed to do? help