2 week stomach bug?

Has anyone experienced a toddler stomach bug lasting 2 weeks? My 2yo has been sick with vomiting (only at night) and diarrhea (in the day) for 12 days. It has been so brutal on him, but we are keeping him hydrated and he’s mostly in good spirits. There have been a couple days where I thought he was getting better but it went back to worse the next day.

At day 10, our pediatrician told me they don’t worry about anything until it hits the 14 day mark as long as he has no other major warning signs (like dehydration, etc). They gave us zofran, which doesn’t help him at all.

I just feel like it’s already gone on too long and can’t imagine waiting 2 more days for them to help us + try to figure out what’s going on. Would love to know if anyone has experienced something similar and whether you got any kind of help before the 2 week mark?