@MarmadukeM
Have you filed for divorce yet? If no - please do ASAP.
Reality of the situation - what he (or you) want at this point is irrelevant, unless you two can agree. For example - if he does not want to sell the house now, you can't force him. And you'll have to have the financial agreement approved by court to kick start the sale.
On the other hand - he can NOT force you to move out, as this is your house too. He can't demand any more off you towards the mortgage. Or, rather - he CAN ask and you CAN refuse. There is nothing he can do to force you to contribute more than you are contributing willingly.
What you need to do ASAP - is to make a separate bank account for yourself and make sure your wages go there. And set up a transfer to the joint account with the amount you think is a contribution you can afford.
In general - I'd send him an email stating your position. Saying something like this....
Dear H, as we are divorcing, here is my proposal for how our finances are organised going forward until we reach a financial settlement.
My preference would be to sell the house now and split proceeds 50/50. But as you prefer to wait for the sake of stability of our child - we will have to continue living in the house as separated parents. Our mortgage + bills budget is £XXX. Splitting it proportionately to our income means I would be transferring £YY to the joint account monthly..... In regards to the domestic chores - I trust that you'll be doing your own cleaning/washing/cooking. While I'll do mine and our child's, (or whatever you think makes sense)
He is not going to like your proposal. But - the only thing he can do about is is to scream and shout, and threaten you. There is literally NOTHING else he can do - so don't let him bully you into anything you don't want to do.
It will be unpleasant for a while. You'll need to get emotionally numb to get through this and not let it break you. Just ignore whatever he throws at you - divorce brings out the worst out of people.
Luckily - you have enough rooms in your house for each of you to have your own space. And - it can be done. Many people have to live together while divorcing. You pull yourself together, get through it and life re-starts