oil "idiot" light

I have a 97 ram 1500, and my oil indicator flashed on today for about a second during regular use. The truck was already norm operating temp, and had been driving for about 20 minutes. My oil level is just right, oil pressure gauge is normal (slightly over 40) and oil temp light is right on as well (about 200-220' F). Does this mean I need to start worrying about the oil pump going or oil pickup screen maybe having some blockage? I have 78l miles, but I am not the original owner. Any ideas?

Thanks!

well, never mind. I did lose a ton of oil (over 3 qts) in a few days. Bad intake manif gasket - corner got sucked in, so consuming oil like crazy. Good thing I caught in time!