Your smoking a blunt dude! Its not uncommon for kids to get sick 'n throw up their first few times smoking cigarettes, and since your inhaling on a tobacco leaf...well whaddya' expect?

Nah but some people do just get sick from weed for some reason, I suggest you find out if your actually one of those people though. Lay off the blunt 'n see what happens.

And considering you said you only had about 4 hits...I just don't see how you could whitey off that lil weed.