I have a new home and my AC unit which is located in my attic started leaking. The unit sits inside a drip pan but was not installed properly and when it leaked water ended up out of the drip pan onto a piece of plywood, onto insulation and onto the sheetrock. The water came through a seam in the sheetrock and leaked into my kitchen. My question is should the sheetrock be replaced or just repaired? If the sheetrock is repaired should I worry about mold?