8 (almost 9) month old skipping naps?! Should I make it just one big nap?

My almost 9 month old has been skipping his last nap lately or having very short nap (today was a half an hour) he has now been awake for 5.5 hours!!! I feel like that’s too young at this age. What should I do? Is this normal?

I was considering just bumping up his first nap (two hours after he wakes up) to make it one big nap and see if that helps? But I feel like at his age this is way too early to have one nap and he should be having two? He also has been waking up 1-2.5 hours earlier in the morning than he used to.

This all has been going on for a couple weeks now! I’m completely exhausted and as a first time mom I don’t know much and just want to make sure I’m doing the right thing!