On the way back I didn't do it, and I felt terrible.

我在回来的路上没有这样做，并感到很糟糕。

youdao

I felt terrible yesterday, but today I feel really up.

昨天我觉得很糟，不过今天我觉得很开心。

youdao

My English / used to be very poor / and I felt terrible about myself!

我以前的英语很差，而且我非常自卑。

youdao

One morning I woke up after a day in the hills and I felt terrible, worse that you would after any hangover.

BBC: SPORT | Other Sport... | Cycling | Flying Scotsman

If I hadn't been this independent, yes I may have stayed because it's not that the relationships were terrible, I just felt I deserved better.

FORBES: Magazine Article

That being said, I think your past weight loss effort was far too aggressive and that is why you felt terrible and were hungry all day.

CNN: I'm exercising; why can't I lose weight?