Oh my God jellybean, I am so sorry to hear this. Big hugs. What a wanker- that's terrible timing.....honestly, a week before Christmas and 10 weeks before the birth- hardly gives you time to adjust, does it?
I don't know how he's going to live with himself.I wouldn't be surprised if he came back with his tail between his legs, but maybe a burst of healthy anger and "I don't need the twatface anyway" thinking would help you right now....Got any possessions of his you can destroy, for a start?
At least you have the support of your family.Hopefully they will wrap you up in cotton wool and feed you lots of lovely food over Christmas...
We have a thread on "Lone parents" at the mo. called "Pregnant and doing it on our own".(can't work out how to make a direct link, but it's quite current...).Lots of people have posted supportive, positive stuff....Come and join us!
On the practical side, you and the baby won't starve. You should get your statutory maternity pay until 6 months; if not, you might be eligible for maternity allowance. Child tax credits and benefits are pretty generous, too. Basically, the state says you should have a minimum of £134-something per week for you and the baby to live on...that's plus rent. The only problems could be if you are paying a mortgage or loan repayments or something;-obviously they don't take that into consideration.
(Just writing this, though, makes me realise that you really need to do some research based on your own particular circumstances, as what you're entitled to varies so much based on that).
And good luck, good luck! Probably you're not even in a state to pick yourself off the floor just yet...just keep yourself safe and warm over Christmas- talk to you soon again hopefully...xxx