Would you just let him sleep?

DS (17 months) I'm pretty sure is getting sick. Yesterday he went to bed at 7pm and slept until DH left for work at 6am. Then was back asleep by 7:30 when DD got on the school bus. That's all normal, he usually will be awake for the day no later than 9:30am but this morning he slept til 11:15am and was really whiny and clingy for an hour or so then was back asleep by 12:30pm. It's 2:30pm now and he's still asleep. I'm gonna have to wake him or at least pick him up at 3:30 because we have to go outside and wait on the bus. I'm wondering if I should wake him now? I don't want him to not sleep tonight but if he's getting sick he needs the sleep so what would you do?

I would just let him sleep.. but I would try to keep him up later so he will go to sleep tonight

Let him sleep.
If he is sick or getting sick that's the quickest way to recover.

I would not wake him until you need to. He needs sleep if he is getting sick

If it was my child. I would wake them now. I would worry about being up.all night later. Lol