I've got a stomach ache and my head hurts.

我胃痛，头也痛。

My Head Hurts, My Feet Stink, And I Don't Love You.

我的脑袋疼，我的脚恶臭，我不爱你。

My head hurts ever since I hit it two weeks ago.

两周前撞了一下,我的头到现在还疼.

My head hurts like hell today. I must have had too much to drink last night.

今天我的头痛死了，昨天晚上喝酒一定喝得太多了。