Oil drain plug...should I be worried?

[mpe50]

I've always had the dealer, and then my independent, change the oil in my 08 3.0si. I just hit 85k and miles, and need to do a brake fluid and tranny fluid change. Figured I may as well do the engine oil while I'm under there.

Put it up in the air, and pulled the drain plug. Took the plug over to the bench to change out the crush washer while it drained. Noticed a few curved metal shavings the same radius as the bolt threads. Then noticed a few shiny spots on the bolt. Looks like it got stripped when last put in. Found a few more tiny pieces in the drain pan. Twisted a paper towel and rotated in the hole to clean out the pan threads as best I could. Got a few more pieces on the paper.

Went to the local parts store to get a new drain plug (strangely it came with a nylon washer?) Crossed my fingers, and started to thread it on. Hit a few spots where it got tight, but I was able to get it all the way seated and torqued to 25nm.

Question is, should I be worried about there possibly being other thread shavings in the oil pan? And will that bolt be likely to come loose and leak?