I have a stuffy nose.
我的鼻子不通气。

I've got a sore throat.
我嗓子疼。

I've been coughing day and night.
我一直在咳嗽。

I can't stop sneezing.
我打喷嚏打个不停。

I've got a runny nose. / My nose is running.
我流鼻涕。

I've got a very bad headache. / This headache is killing me.
我头很痛。/我头快痛死了。

I feel sore and ache all over.
我觉得全身酸痛。

I am trembling with cold.
我冷得全身发抖。

I've got a temperature. / I'm running a high fever.
我发烧了。/ 我发高烧。

I feel like I'm dying.
我觉得我好像要死了一样。