engine nosie

[Mani]

Hi i was driving home tonight normal Cruise then all of a sudden heard a noise as if i was dragging something or even i belt chewed off then went away,few minutes of driving noise came back i pulled over and engine is tapping from top of motor even sounds like bottom hard to tell noticed that oil pressure was lower ive seen like low as 20-34 flickers by 5 sometimes, starving for oil?? wtf im so depressed now, any ideas ps i had heads redone stage 3 cam 7000 miles since
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[colo_evo]

Check the oil filter for metal.