Low grade cannabis quite often has a little mold, and many years ago people thought making it mouldy improved the strength (weird concept) ... the bottom line is I have never heard of any one dieing from smoking moldy weed, heard of plenty of people getting sick from sharing dirty bongs though.
A little mold won't hurt you.
But as already been suggested, you can always make hash (gumby method is cheap and easy), you can make canna butter or oils, you can even water cure for a week - the one thing you don't want to do is throw it away.