Cat won’t let me sleep

I have a 13 year old sphynx (male, neutered) and recently, he won’t let me sleep. He sleeps in the bed with me and is very cuddly which I love, so I don’t want to lock him away all night if I don’t have to. I’ve had him for 5 years and he’s always woken me up about once per night to turn on the faucet for him to drink water, and I’m fine with this. It’s a responsibility I accept as a cat owner.

But lately, it’s 3-4 times per night and he doesn’t even want anything. He has food, doesn’t use the faucet, not even the litter box. He just goes downstairs and yells until I come get him. Sometimes he doesn’t even want to come back to bed, he just wants to sit downstairs and yell. He doesn’t come if I call him either, which is a recent development.

He’s never been very active (I adopted him when he was already older) and sleeps at least 20 hours per day. I’ve tried all sorts or toys and activities for him and he doesn’t care, be just wants to be pet or buried under a blanket. The advice online is more playtime/ playtime before bed, but he just isn’t interested in this.

I’m mostly worried about his health and well-being, it seems like he’s trying to communicate something. But I have a really demanding job and I can’t go on with no sleep. I scheduled a vet appointment but is there anything else I can try or do?