This could be a multitude of different problems. I'd suggest some simple T&E and find what's going on. Start with the simplest solutions first. Tune up, plugs, wires, air filter, oil change, and the like. Then see how it acts after that.

Going with that, if you still are having problems it's time to go into more detail with your search. Start checking things such as your spark, fuel pump, fuel filter(s), catylitic converter, and even check your fuses for blown fuses.

In the case none of this works, it's more then likely that you'll have to end up finding a decent mechanic. They can start testing other parts such as the cylinder compression, valve adjustments, and even internal wear if need be.

One big question however, if there is an engine light on, get it checked with an OBD reader at autozone, advanced, or the like of auto stores. I hope this helps you out bud.