1, My chest feels rather tight.
2, I have a trouble breathing.
3, I'm having chest pains.
4, I have a stomachache.
5, Have you got any feeling of nausea?
6, I feel chilly.
7, I'm losing my appetite.
8, I have lose bowels.
9, I have a backache.
10, I have a fever.
11, I had a cold.
12, I'm allergic to pollen.