Brother just V'd

[Noobiphobic]

I started off with a cough a little more than a week ago and my brother got it a couple days after that. Eventually the symptoms became more cold like so I didn't really worry, my brother seemed to be getting worse faster and just today he seemed really out of it, tired, headache, no appetite, bad sore throat. My cough had gotten worse today as well but I figured it would just get better soon. About 15 minutes ago my brother started throwing up, I am avoiding as best I can but I'm really freaking out because it seems like we have the same thing and I think I'll get to that point within a couple days. Help!

EDIT: Apparently he only felt like he was going to throw up so he went into the bathroom and started gagging, still freaking out.