There is only one way to find out and that is to consult a solicitor who specialises in this kind of work. Any large local firm of solicitors will have such a solicitor, but check.
There are so many snake oil salesmen out there, masquerading as legal experts wanting to sell you a scheme that will save your house from being sold when you go into care. None of them work. Use a good solicitor.
Also do bear in mind that if you do succeed in protecting your house from being sold to fund your care, you put yourselves in the hands of Social Services, whose first option will be to keep you at home for as long as possible, regardless of your preferences and if care is inevitable, because the sum they pay for social care is so low, you will end in a residential or nursing home at the bottom end of the market with all that implies. They will also put a lot of emotional and other pressure on your son to contribute to the cost of your care.
See a good expert solicitor and discuss the pros and cons with him.