Hello,I am sorry your little one has you worried.
Scooting in a pup this age is most likely due to worms tape worms being the most common cause.
A pup should have their first set of shots at 8 weeks so I would schedule his appointment as soon as possible to get him started.
He will need a total of 3 sets of shots done 4 weeks apart. The vet will deworm at each of these appointments as well. Make sure you let the vet know he is scooting as we do not normally deworm for tape worms unless there is a problem.
Until he has all of his shots keep him close to home no dog parks or walks through the neighborhood until he has at least 2 of his Parvo vaccines.
Be sure he is getting fed 4 times per day as pups this young can not regulate their blood glucose levels if they go to long without eating resulting in hypoglycemia
Here is information on this
I hope this helps, please reply back if you have additional questions or concerns