To add to what Mr shiftright said, your comment, "I been told that I may have gunk in my oil pump screen that needs to cleaned out.", leads me to believe that it is a shotgun diagnosis by someone. Meaning they are guessing and hoping to make a larger sale.
Bottom line is, if the pickup screen is plugging, then you have far more problems than just the pickup screen. If it has gotten that far, then bearing damage has already occured.
That being said, you need to first confirm that the oil pressure your dash gauge is seeing is what the oil pressure actually is and that involves hooiking up a mechanical test gauge. Only then can you confirm an actual oil pressure problem. Sometimes it is the sending unit that is the problem and not the oil pressure.
If the oil pressure is indeed the problem, then sea foam or some other engine flush isn't going to help, in fact if your engine is sludged up, then it can actually do more harm than good.