Your not going to have metal shavings on your dipstick from blown head gaskets. You get shavings from something coming apart in the engine. Probably needle bearings for the roller lifters or something of the such.
Like I said it could be a roller lifter needle bearing that dropped, could be a stuck lifter that wiped a cam lobe. Anything can happen. Take some pictures and show us. Might also be beneficial for you to drop the oil pan and check to see what's in the bottom of it.
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