Oh I just want to hug you, it must hurt like hell At first freedom...But then you start to feel so lonely, I get it.
I think pale.empowers advice is absolutely spot on. You could also post on exjwreddit too, as there are lots of kids your age in exactly your situation. I believe it will get better but you must take care of yourself, as your parents are not watching over you so much. And please, no smoking!!I speak as one who is suffering now for doing so. Your mum could probably smell it on you or your clothes. It's very obvious to non smokers even when you do so away from them.
Don't use on your pain, it's a dangerous place to be. That's how addictions happen. I seriously would consider getting some help from the school councillor as this is a hell of a chunk you've bitten off.
I hope your parents soften their stance when they start getting over their anger. In the meantime please seek out some help as you are clearly suffering and know you are a very worthwhile and valuable human being who deserves the love of his parents no matter what their warped religion tells them.