It would be wise to call a professional in this kind of situation. Any water or moisture in your crawlspace is obviously a bad thing. It can lead to mold or even beam rot. Most companies do free inspections - they will actually look in your crawlspace and be able to tell you what caused the leak and what kind of options you have to repair it. A good site to check out is Wet-Basement-Waterproofing.com Good luck!