IF your discarded oil is not cloudy white, you are not leaking coolant into the crankcase. It is pretty evident if that is the case. Also, leaking coolant into the crankcase may raise the oil level on the dipstick. Simply, look at the oil on your dipstick. If it looks normal, ie no milky white color, your are probably not leaking coolant ( also check coolant level from radiator cap). If coolant leaking into exhaust manifold, you would see thick white smoke out your tailpipe.
If you see no leak on garage floor, you should count yourself lucky and spend your money on other things.
Hope this helps
Ferd