Oil pressure issues

2001 dodge 1500 318 37000 miles:
howdy gents
so I was driving down the road and noticed my oil pressure gage was reading in the 37-ish area. Slightly low but no noticiable changes. Suddenly my check gauges light comes on and I have no oil pressure. Less than a few minutes later a tapping is heard and I pull over immediately. There is no water in my oil or vice versa and I have plenty of oil. If I let the truck sit, it runs fine (no tapping or nothing)for a couple hours before it does it again. Im sure its not my oil pump and hooking it up to one of those mini computer came up nil. Looking around my truck, I noticed a very small oil leak(more like a seepage) around my oil cooler hose. Would that cause that kind of problem?
is there a different way to donate because I dont like to send my information over the net.
thank ya guys