What's Wrong With My Little Man? Part 2

I took Davis to the Dr. the other day. They think it was just a virus he had but sent me home with a kit to take a stool sample to check for bacteria just in case. The Dr. said it could just have been the post nasal drip upsetting his stomach while he's laying down so I've been propping him up on pillows at night. He tends to wiggle off them though. So far, he's been fine. No new symptoms and no more throwing up at night. I still worry that it might be something else because he would seem fine for a day or two and then start back up again. I'm keeping a bucket next to the bed for a while just in case. Hopefully this will be the end of this and he'll be fine.