Leak under distributer

unable to give answer can not see your leak and since oil under pressure leak can be anywhere clean area and check from top down

head gasket failure

Have you had front or rear glass changed? Is there rust around windshield or rear glass? Have someone run water hose over upper glass...while someone inside car inspects for water trail. Hope this helps.

There is a timing cover gasket behind the water pump.
You may have to clean off the block to find the leak. Mechanics can use dye in the oil and a black light.

Check the bottom side of the water pump for wetness, as well as the lower radiator hose. The water pump if leaking, will run the coolant down the front of the motor,and can appear to be coming from the top of the oil pan. It is nearly impossible for the top of the oil pan to leak coolant.

CK- Try a set of Valve Cover Gaskets. It cannot leak from the front cover area because it is where the timing belt rides and there is no entrance into the engine EXCEPT the front CAM SEAL... Remove the cover and look toward that seal behind the cam sprocket. If so it is also leaking down into the front cover and beyond. But look at the Valve cover gasket first, since you mention that source.
Auvedersein!!!

Generally that means water in the oil. Is the oil on the dipstick the same color? If so, it could potentially be something very bad, such as a leaking head gasket or coolant passage that is allowing antifreeze to leak into the engine when under pressure. If the milky appearance is just on the refill cap and the oil on the dipstick looks normal, then you could just have a small amount of water from condensation. That can happen if the vehicle sits a long time without being used.

On most cars there is a weep hole that goes out when your water pump does. Chances are if your car was not making any terrible noises that it is just your waterpump.
Try cleaning the area then watching carefully to see where the fluid is coming out.But 9 times out of 10 its almost always the waterpump. If it was coming out of the oil pump then chances are that you will be able to see coolant on your oil dipstick and then thats a whole new set of problems.

possibly leaves or other trash way down under grille at bottom of windshield

Look under the car and see if the drain plug is screwed tight into the oil pan or if something has made a hole in the oil pan.
Do the bolts holding the oil pan to the block appear to be tight?
Open the hood, reach down behind the motor on the passenger side and see if you can tighten the oil filter.It should be as tight as you can possibly get it with your hand.