erm......I think the words Im looking for are 'OH DEAR,VERY NOT GOOD' !! I may be wrong but one of the mechanic type guys will be along soon to give you a proper answer !! Soz cant help any more than that but it def doesnt sound good as water in the oil usually means a pricey head gasket job,best thing to do in my opinion is to NOT DRIVE it until it gets sorted,dont make the problem any worse !!