The rotten egg or sulfur-like smell with a lot of gas and diarrhea is typical of giardia. Often the stool is oily or greasy as well. Do you have any reason to think you might have giardia? If so, the diagnosis and treatment is fairly straightforward.
Otherwise, if you're taking some new herbs, it's possible that they are upsetting your stomach. If you don't need to take them, try taking a break and see what happens.
Why do you think you are seeing dead flukes in the stool? Are you sure? Could it be undigested food?
If none of this applies to you, you could always just watch your diet and try gas-x or activated charcoal for the gas while your husband visits...