HELP with my teething and mischevious german sheppard puppy!!!!?

Around that age puppy's teeth do fall out. The teething part helps them loosen the teeth. When he is like 4-6 months you should look into getting him fixed. If he chews something you don't want him to give him immediately a toy that he can chew. My German Sheppard loves soft things to bite like cloth or a rope. I hope things go well. He's going to become your best friend don't get discouraged.