Hey my name's dan i'm 15 and yesterday I got some type of 24 hour flu when I woke up yesterday I felt like crap, my smoach felt like it was gonna through-up and I had diarrhea.

When my mom found out she told me my sister who is 14 has the exact same thing as I did when she woke up (we both got this on the same day)
we both puked about 10 to 13 times

so we started thinking how we could of got this flu we were pretty sure it was the burgers we ate (because that was the only thing we ate with eachother this week).

But the next day when I was asking my sister about her diarrhea she said it was that average liqid poop brown color and she said it was like pooping out pee.

It was the same feeling for me but....My diarrhea was yellow (like pee yellow) it looked exactly like pee but it smelled like poop..

Could somebody tell me if yellow diarrhea is normal?
Also I lost alot of weight when I was sick could somebody tell me how I could regain that weight ?
Also I work out how much days should I wait before I sould start working out again?