Help me help my DS---WWYD?

Ok, here is the rundown.

DS is 8yo and had Chicken pox two weeks ago. We finally recovered from that and the last Friday he came home from school feeling "pukey". Indeed, he proceeded to puke all that night from 11:00pm until 5:00am. He was also in extreme pain in his belly. The next morning he seemed better - no puke, just tired. Slept Saturday from 4:00pm until 7:00am Sunday morning and only ate a small bowl of cereal te whole day. Felt well enough to go to his Dad's sunday but Dad said he hardly ate anything and was really sedate and mellow.

So, he went to school this morning and by (9:30 was in the office and called me wanting to come home. I picked him up and he does look like a sad,sick boy. He has no fever, no desire to eat, belly pain, feels like he's going to puke. He crawled in bed and has been listening to his books on tape since he got home. He says nothing else (emotionally) is bothering him, he is just tired of not feeling well.

I've got an appt. to see his Dr tommorrow morning, just in case things get worse or at least, not better.

My question is: Is his system just shot and tired? Do I assume he needs more recovery time and rest? Could there be anything I am missing? A friend mentioned appendicitis - and now that is swirling in my head.

Any imput, advice would be apprecitiated! I just don't know what to do or think anymore.

***Please send me good vibes as I am also PMSing with my 3yodd who has chicken pox and my 1yo who is getting teeth and is very cranky. Oh, and it's supposed to start raining again! *****