I think I've got the flu.
I've got a bit of hangover.
I feel absolutely awful. My temperature is 41℃, and I've got a headache and a runny nose.
It's really hurt.
I feel dizzy and I've got no appetite.
You don't look too well, maybe you should take the day off from work.
A: You don't look too well, maybe you should take the day off from work.
B: I couldn't do that. I have an important meeting to go to today.
A: Do you feel okay?
B: Not really. After a twelve-hour flight, I've got jetlag and on top of that, I think I've also got the flu.
A: Why don't you call your secretary and tell her to reschedule the meeting? You should really get some rest, or you'll end up feeling even worse than you do now.
B: Could you feel my forehead and check to see if I have a fever?
A: You're really hot. Let me get you some medicine.
B: Okay. I'll stay home this morning and rest. But if I feel better in the afternoon, I'm going to go to the meeting.