My child is 3 1/2 yesterday he slept a total of 20 hours out of 24. Took him to dr this was why he had been out of bed 3 hours he would not eat anything, and did not drink but maybe one ounce of apple juice. He seemed hot but no temp. Took to quick care seating all his vitals were okay, no temp. checked for flu and strep nothing came back. We were there for 3 hours and he slept the entire time only rousing when staff came in exam room. He felt very hot the entire time. Dr was concerned that he was so lethargic and hot without temp. She sent us home with nothing. But she did say if it was her child she would take him to er for more testing if he did not rouse soon. After 2 more hours of him sleeping took him to a er. The er was over flowing with flu patients. We seat there for over 7 hours and never seen a dr. Brought my baby boy home. He roused for the care ride home and stayed away till bed time maybe and other hour. Going to call his pediatric dr today. This does not make any sense and can not find anything o n web.

Testing for something rare is going to be expensive.
The first thing you need to do while waiting to see his doctor is to get fluids in him! He is showing some of the signs of dehydration, including not urinating, and sleeping might be the result of typical lightheadedness. You are going to have to make him take a sip or two at a time of whatever he likes. You can buy Pedialyte, which has electrolytes in it. Water down the apple juice a bit if that helps but get those liquids in him somehow, NOW.

... and now you both have been exposed to the flu, which of course will start with a fever, most likely, and might appear in 2-3 days.