YOU SAID:

I'm surprised my hangover is not as bad at all as it should be, but that's probably because I slept for like 12 hours

INTO JAPANESE

二日酔いが思ったほどひどくないことに驚いていますが、それはおそらく12時間ほど眠ったからでしょう

BACK INTO ENGLISH

I'm surprised that my hangover isn't as bad as I expected, but that's probably because I slept for about 12 hours.

INTO JAPANESE

思ったより二日酔いがひどくなくて驚いていますが、12時間くらい寝たからでしょう。

BACK INTO ENGLISH

I'm surprised that my hangover isn't as bad as I expected, but it's probably because I slept for about 12 hours.

INTO JAPANESE

思ったより二日酔いがひどくなくて驚いていますが、12時間くらい寝たからでしょう。

BACK INTO ENGLISH

I'm surprised that my hangover isn't as bad as I expected, but it's probably because I slept for about 12 hours.