It started out slow, then recently it got so bad I would loose oil pressure if I went 40 miles without topping it off again. I couldn't find the leak so I brought it to a shop who said it was coming from behind the ac compressor. I also have not checked the oil filter(but did have it changed after the leak got worse)

Is this a common place for a leak? Is the oil pressure sender or switch in this area?
I messed up the title, it a 1998 caravan.