YOU SAID:

Had a very bad headache at night and could hardly fall asleep but didn't want to take paracetamol

INTO JAPANESE

夜はひどい頭痛がして眠れなかったが、パラセタモールを飲みたくなかった

BACK INTO ENGLISH

I had a terrible headache at night and couldn't sleep, but I didn't want to take paracetamol.

INTO JAPANESE

夜はひどい頭痛がして眠れなかったのですが、パラセタモールを飲みたくありませんでした。

BACK INTO ENGLISH

I had a terrible headache at night and couldn't sleep, but I didn't want to take paracetamol.