Emily
Supportive ((((hugs)))). been there done that
Try to think of it this way, marriage is a partnership based in compromise. Each of you have your strengths and weaknesses. You happen to be good at handling money. This happens to be husband's weakness. So you're stepping up to the plate to handle this area so that the marriage, and family continue to run smoothly.
Not really too different from say if husband had filled the role of handy man around the house cuz if you'd try to fix something it'd only break it more. (same situation different area)
Thinking of it this way helped make it not seem so weird to me. I was raised the man always handled the bills and the money. It made me really uncomfortable to take over that area.
Keeping fingers crossed husband is cooperative and gives you little hassle.