5 month old sleeping

Kaytlyn • 28. Happily married. PCOS. Mommy to 4 sweet babies JCJ 7/26/14 KRP 6/10/16 ARP 1/17/20 EMP 11/11/21 💙💙💙💜

I know most of you are going to say I’m lucky he’s sleeping, but this just isn’t like my sweet baby. It’s noon and he has only been awake for an hour and a half total today and has only had 1 bottle. When he’s awake he’s acting perfectly fine and happy, playing. He’s wetting diapers normal. But I put him to bed at 9pm last night and he slept until 9:30 this morning and stayed up for an hour and half and has been asleep since. He did the same thing yesterday. Is it a growth spurt? Should I be worried?

Edit to add: he’s always slept through the night that isn’t new. He just doesn’t normally sleep all day like this.