Coolant leak on 95 Geo Prizm

Hi...I have noticed that if and only if (I don't know if this is still the case this time) I leave my car sitting for more than two days, there is a bit of a coolant dribble in my garage coming from the waterpump/oil pan area near the passenger's side. If I drive during the day and then leave the car sitting overnight there is nothing. It only occurs if the car is sitting long enough and it's only a slight drip. What could be happening?

It could very well be the water pump. If you are due for a timing belt do it at the same time. How many miles on the car?

i also have a prob with antifreeze smell coming out of heater vents but very faint all fluids r full and no leaks inside on carpet any help would be great i own a 1995 geo prizm and it also has the check engine light on