Feeling overwhelmed with a messed up life just give me straight up advise?

I am fourteen i was d my my sister boyfreind last summer, my dad is a crank/meth/pot dealer. My mom is a stipper with a drugie past. I live with the same sister that boyfreind d me and she has a new boyfreind that recently hit her....and other things. I am feeling extremly over whelmed. I am doing myh best to keep my grades up. But I see the point anymore. NO I CAN NOT GET A COUNSLER...we are to poor. Plus I am starting to get in to drugs(weed) . I just want help with this sorry if i sound like self pity its not. I just dont get wly it all happens to me? plus i have learned no one can be trusted