25k is alot of money, but it definately could be worse. I competely understand you not wanting to tell your husband... however... he will be even more upset if he dosn't find out until it is too late. If I were you, I would tell him. You can't hide it forever and maybe he knows something that might help.
In the mean time, focus not on what you can't do... but what you CAN do. Do you have any talents or trades that might bring in money? Do you like to sew or paint or something, anything at all? Make a list and see what you can do with it, if you have internet (which you must to write this) you have many many resources to make money, even if it isn't alot. Sell a craft on ebay,... write greeting cards for small company.
Other then that, see about what jobs you might find without transportation.. paper delivery? A local conveinent store ect. Check your local paper for help wanted ads or even ideas.
Lastly, take care of yourself. Eat, sleep and take a walk outside or meditate if you have to. You cannot remedy your situation if you are weak and sick and cause MORE bills. Good luck!