25 weeks help!

Je
So I have a super active baby boy, and he's usually moving at 830-9 and then around lunch, then sometime in the evening. I just hit 25 weeks yesterday and he hasn't been moving nearly as much as he usually does. I have felt him move, but nothing like normal. Should I be worried? Has this happened to anyone else? I read that it could be a growth spurt.. I just need to ease my mind. Help please!