Oil pressure issue

Ok guys so I just dropped the pan and pulled the rear bearing cap just to varify the galley plug was In and it is. I found a couple of small shards of metal in the pan but nothing huge. Any thoughts from here? I'm going to pull all the caps to make sure everything is ok and reassemble with more assembly lube but I'm stumped and concerned. I took the oil pump apart and it looked ok and clean. Can the relief plunger be faulty and if so what should I look for? Sorry for the barrage of questions I'm just sitting here scratching my head.