Notice the poster said something about having a smoke (tobacco) as well.

I know the first time I had tobacco, or first few times, I got REALLY sick to my stomach. I got pale and had to lay down for awhile.

If you're new to tobacco, it could have been that that made you sick.

But I have heard a lot of new tokers who get sick too. Too much at once, but I'm guessing the mix of cannabis and tobacco is what made you sick. Mainly the tobacco.