Firstly, I am very sorry to hear of your husband's illness. Hopefully, he will make a full recovery.
I would advise that you:
1. Pay off the credit cards. You may not get enough of a limit on a new card to transfer the balance especially as your income is now lower.
2. Sell the investment property if you can
3. Do NOT sell your PPR. Go instead to the Community Welfare Officer and ask the HSE to pay the interest on your ppr mortgage.
4. MAintain your mortgage protection policy and do not miss a payment
5. Go to MABS and discuss your finances
6. Apply for FIS as previous poster said.
Best of luck and good wishes to you and your husband,
Slim