Coolant leak/ no heat

:shakehead I have a 2004 Intrepid, 2.7L engine. Recently, I turned the heater on and it was blowing cold air. A few minutes later the car overheated. The coolant had all leaked out at some point. We put water/antifreeze in it, and the heater seemed to work fine for a while. The car has now been parked for about five days, and I noticed a puddle under it. When I got under the front to inspect, it looks like the leak is coming from the area by the oil filter. Looks like it was leaking around a couple bolts. It was on an incline. When it is sitting flat, the leak is more towards the front of the car, closer to the radiator. The AC works fine. One time the drivers window wouldn't roll up until I hit the button a few times (don't know if that has anything to do with it). Any help is appreciated.