You can never be too cautious with money.
I hope that you and your husband can work things out. It is horrible when you can't be civil living under the same roof.
Perhaps cook him a nice dinner, buy him some flowers and try to have a talk. (Men like the guesture of flowers more than we think!) When the voices start to raise, agree to disagree, and continue to TALK about it later. You can't get anywhere when you are arguing.
Let us know how you go, you are in our thoughts.
Big hugs xxx