21 weeks and my son is kicking like CRAZYYY!!

Cannot believe it! Im a first time mama and have been feeling my sons little kicks for weeks now. It is getting insane though. He is sooo active it seems. In the mornings i feel him even stretching haha. His hand and foot pushing my belly on opposite sides at the same time. Craziest thing!! Is him being this active a good thing i hope? I have not yet went to my 20 week appt. Comment away pretty mamas :)