Can you still drive your truck if you have metal shaving in the oil pan?

Its not a good idea to since that means something is grinding down. You may want to rebuild engine asap since this could be piston rings wearing and etc. If you don't change your oil, I would do so immediately than check oil again to see for shavings but chances are that a rebuild is the best in this case. If you don't rebuild it now, you most certainly will soon with metal shavings going through your motor.