Hey

firstly

and welcome!
I would try not to worry about it all right now... maybe the shocks still there for him in finding out that your pregnant (congrats by the way

) and he's male they have no idea about responsibility etc and how demanding a baby is!
Are you's in a relationship still? Because it sounds to me as if he is thinking life can go on for him and he'll have a child and girlfriend that he can just pop over and see when it suits him and basically get the easy side of it all. Which isnt right. He should either be fully involved and committed or not at all type thing. But personally I would give him some time
In regards to housing etc...I would stay at home at the minute and try not to worry about it all. Depending on whether you work or not etc you could apply for housing and get housing benefit etc and things like jobseekers allowance or income support etc and you will become a higher priority for housing because of overcrowding etc (on a points system) Im not complety sure on it all and how it works as I work and am living at home for the meantime!
But I will say something....Sometimes living at home isnt as bad or as hard as it seems!The support of family and the help they can give you is great! I constantly worried about having space for stuff and noise etc from my younger brothers and enough space to share my room with the baby etc and where would the cot go? Clothes? Changing stuff? Moses basket? Pram? Things like that...but its been ok. Our house is overcrowded as well and my brothers are really loud and messy but once your LO arrives family tend to make a bit more effort to clean up and keep the place tidy etc.
You will manage though! Yes it'll probably be hard and a struggle but its all possible!
Sorry i rambled a bit...not sure if any of it is much help. I would just concentrate on your and your LO for the time being and let everything wash over you then later once you have a better idea of whats going on, you can go to the citizens advice bureau and they can help you in terms of what your entitled to and with housing and form filling etc
xx