What's wrong with you? 您怎么了？

I feel a dull pain in the stomach. 我感觉胃痛。

Please lie down and I will examine you. 请躺下，我给您检查一下。

I have a splitting headache. 我偏头痛。

What's the matter with you? 您怎么了？

I have a splitting headache. 我偏头痛。

When did the pain start? 从什么时候开始的？

Last night. I couldn't fall asleep the whole night.  昨天晚上。我整晚都睡不着。

Have you ever had such experience before? 您以前有过这样的情况吗？

No, it's the first time. 没有，这是第一次。