I'm not feeling (very) well.
我覺得不大舒服。
How are you feeling,exactly?
您感覺怎麼樣呢?
What seems to be the trouble?
您感覺像是什麼問題呢?
Is there anything I can do?
有什麼我能
幫忙的嗎?
I have a cough and a runny nose.
我咳嗽,又流鼻涕。
Do you have any medicine I can take?
你們有沒有我可以吃的藥?
I don't travel very well.
我旅行時一向不大舒服。