I got a hangover.=I drank too much. 我宿醉还没醒，我喝多了。
I have a bad/terrible hangover
例句：
I got a hangover,some hair of the dog would probably make me feel better.
我喝多了，一些解宿醉的酒可能会让我舒服点。
I got a hangover,I went to the bar yesterday to watch the football game.
我喝多了，昨天我去了酒吧看足球比赛。
A:Wake up,are you alright?
醒醒，你还好吗？
B：I got a hangover.
我喝多了。