[Baby2015]

Hello everyone,
I have this question, I would be very happy if someone could help me!
I'm a single mum, and decided to live in UK one year ago. I was living in my sister's, but my sister has already 2 kids, and she's pregnant.
The problem is that I don't feel confortable because her house is not big enough to be able to accommodate me.
So I've heard that the government helps single parent's with homes or housings, but how can I ask their help? I'm not working at the moment, so my situation is very complicated.
Is there someone who can help me please?