I have aheadache, nausea and vomiting.
我觉得头痛、恶心、想吐。

I feel under the weather.
我不舒服，生病了。

I feel unusually tired.
我感到反常的疲倦。

I feel light-headed.
我觉得头晕。

I have been staying in for a few days.
我生病在家几天了。

My head is pounding.
我头痛。

My symptoms include loss of appetite, weight loss, excessive fatigue, fever and chills.
我的症状是没有食欲、体重减轻、极度疲倦、发烧和发冷。

I feel exhausted most of the time.
我大部份时间都觉得非常疲倦。

I haven't had much energy for some time.
我感到虚弱有段时间了。

I feel drowsy, dizzy and nauseated.
我觉得昏昏欲睡，头晕目眩，还想吐。

I feel as though everything around me is spinning.
我感觉周围的东西都在打转。

I have noticed some hearing loss.
我发觉自己的听力变差了。

I have some pain and itching around my eyes.
我眼睛周围又痛又痒。