Was the oil fresh and clean when it was parked or old and dirty? Dirty oil can sludge up over time and clog the inlet. It would be very expensive to overhaul your engine, so I would suggest you take no chances. The pan needs to come off for a thorough inspection of the oiling system.
Any time a car is expected to not be used for several months the oil should be changed if it has more than about a thousand miles of use.