I agree with so many post about getting the right advice and support.
Women's Aid is fantastic, please get in touch with them even if it's only by phone or may be on-line and at the very least read up on the web site.
I was in one of their safe houses back in 1981, early days for them and I have been a supporter of their work ever since.
I saw someone suggested you getting a lock on the spare room door, good advise. Someone suggested you find a safe place to go, even if it's temporary, very good advise.
Also the post about locking your work things and valuables away, more good advise.
If possible I'd look at going further and getting important documents and valuable thing out of the house if there is someone you can trust with them. Even if you don't go anywhere right now.
I think you should give serious consideration to getting out even if it's only for a night to give you space to centre yourself. But you're there in your situation so you are best placed to make that call.
Get your passport, Birth, Marriage Certs, NI details Bank Statements (proof if needed later) pension/income things like that. Valuables and sentimental items that. Also if possible get some cash and have it somewhere or with someone if you trust them, start and account that's only yours. If you don't need your running away money you can put it back.
I had £9.40 two nylon holdalls and DD1 age 9 when I entered the refuge and by the afternoon all the money in the bank had gone.
I was young, naive and in shock as what I thought was "Just and an other Argument" went very wrong very quickly.
Please use this time to put safety measures in place, if you don't need them you can undo them but if you haven't got them and you need them it's a tough place to be.
Take Care and I wish you lots of Luck ( divine intervention, whatever you wish to call it) because in situations like this we all need a bit of luck to have the right people, right help in place when we need it.