I have a headache and a cough.

我头疼并且咳嗽。

One day, I have a headache and a stomachache.

有一天，我头痛和胃痛。

Oh. Now I really have a headache.

哦，我现在是真的头疼了。

John: Why do you have a headache?

约翰：你为什么头疼？

I have a headache and feel chilly.

我头痛而且觉得很冷。