Stomach virus, help!?

So on Friday my sister& I woke up and had a stomach virus. I had diareah all day and puked 7 times and overall just felt bad. (My little brothers had the bug too, however not as bad) Saturday I felt a whole lot better (still no appetite) so I ate a little chicken and rice soup and mainly saltines however at dinner I ate a slice of pizza but no more because I felt better. I was pretty sure I had hydrated well but today I started to feel nausea, and was dehydrated and still no appetite. I'm lying down now because my stomach feels funny but I've gone to the bathroom (no more diareah since yesterday) and no more puking since Friday. My dad says I probably don't feel well because I was dehydrated. What should I do? When will I feel better (I had Heartburn too)