I think you may mean Medicare. Medicare is a health insurance and doesn't pay for companions or caregivers. If you are low income, Medicaid may help but there has to be a Medical reason. Your county Office of the Aging maybe able to help or point you in the right direction.
There are no social security benefits for home care. Medicare may provide some in home care hours if medically necessary, but not for a companion. A companion is something that would have to be self paid.
You can use your husbands social security income to pay a companion. But social security does not offer any assistance programs, they won’t pay for a companion or caregiver.