As in, has a cold....do you wake him/her up from naps to stay on schedule?

My usually 30 minute napper took a 2.5 hour long nap this morning. He then took a 30 minute first afternoon nap....which made him ready for a second afternoon nap at 3:30. It is now 4:40 and he's still sleeping (unheard of). He usually goes to bed at 7 or 7:30 and his max awake time is 2 hours before bed. If it becomes 5 or 5:30, should I wake him up to stay on schedule for bed? He was in an OK mood today - he's just been a little congested and has not eaten as much as usual.