Look, you clearly need a lot of practical help to get a home of your own and start protecting yourself and your baby.
What is stopping you from acting on the advice given here? Honestly?
Sometimes people don't know the real basics like how to get online to contact services, or what to ask for etc. that's ok, ask here for help and I'm sure people will talk you through those first moves. Or ask someone in real life to help you like your GP, or midwife?
But at the moment, you just sound like a kicked puppy dog. Running back to its owners hopefully wagging your tail desperate for affection... Only to get another kick. 
But you know what? You are NOT a puppy dog. You are a person who can learn and change and stand on your own two feet. And you have to, if not for yourself, for your baby's sake. When the baby comes it will all get so much harder to make big changes - totally possible, but just harder.
If you do want to change your situation, now is the time to do it.
You seem to be stuck in a pattern of behavior where you rely on people who don't have your best interests at heart. Then getting distraught when they don't behave in a way that has their own best interests at heart.
No one can do it for you. Though there's lots of support out there once you've started to help yourself.
Ask yourself, do you want to remain abused by your mother and her partner, upset, stressed and emotionally in bits? And keep on hoping they'll change and being horrified and shocked when they don't.
With the wisdom of hard experience I can tell you for sure that nothing will change if you don't do the changing. No one else will change. No one else even wants to change. And sadly, I tell you that from experience too. It's a rubbish situation, just horrible, but really, you will be in exactly the same state for exactly as long as you keep hoping someone is going to do it for you.
It must be so stressful and hard to keep going in the bad situation you are in. But if you direct even a bit of that energy you're using to stay in a bad situation, to help yourself, then you'll be amazed how easy everything feels when you're free of this people you're surrounded by using you. I was shocked - I thought I was just a failure, everything too hard and too stressful .... I was amazed by how I could cope, and more than that, enjoy myself, when I wasn't spending all my time, energy, money, love etc on people who were using me and putting me down.
I probably sound tough and mean, but it's so sad that you seem incapable of getting yourself into a better situation!
I am frankly amazed your GP knows any of this and hasn't suggested ways to get help. Unless he/she doesn't understand that you actually want to get out? Go ask about shelters, emergency housing, literacy and translation help, and counseling as you desperately need some self esteem and fight back in you!
Ps debt is not going to get you put in jail! It's no surprise you have money problems too. You need advice. There are ways out of it. But hiding yourself and pretending it's not happening will only make everything worse, not better.