The term "Rosszul vagyok." actually refers to"I am not feeling well."
that is basicially the same!
"Vagyok rosszul." is wrong?
It sounds pretty weird.
Why not "Rosszul vagy" ?
Because vagy is "you are", not "I am".
So there is a correct and incorrect word order? Does the verb come last?
Not necessarily, but here it's much much better to have rosszul in front of the verb.
I have heard the word betteg (sp?) used. What does that mean?
I think the correct translation for this is "Beteg vagyok"