I'm looking for advice.

I'm 19 years old and pregnant, I'm having a boy. I don't live with my mom because she is a drug addict. She does crystal meth. She has did meth for about 15 years. I found out she was doing drugs when I was 16, and after I turned 17, I moved out. I started finding home made meth pipes. (Made from light bulbs.) well for a couple of months, she started changing, really bad. I think she started shooting up. Well, last night she had a guy over, and I went to my grandparents and got my grandpa, because she was so fucked up. And I didn't won't to leave my little sister with her. So he went don't there, and told the guy to leave, and she packed and left also. Leaving my little sister!