Firstly, if at any time you feel in danger you need to call 999 and get support from the police.
If you want to stay in the UK you have some options:
Go to a refuge and apply for council housing/private housing;
Stay in your own home and get on the council list;
Get legal help to stay in your home and get your husband out.
If you want to go into refuge you can speak to the police, council or Women's Aid/Refuge/Local support and say you are unsafe in your own home and need to leave.
To get on the council list you'll need to go to the council and tell them about your situation, they may suggest that you go to refuge - but that is your choice to make.
You can get an
injunction to get your husband to leave - legal aid has been reduced and you will need advice if it will work for you.
This page from Women's Aid will give you more information:
Where can I go? - Housing optionsThis thread may be useful If you want to move back to the states but can't afford the plane ticket..... if you have made up your mind to return to the states.
Please get some support and see another GP who is more sympathetic.
There is local support available to
you, please reach out to them for some in person support and advice.