I saw this saying in a conversation book:
I didn’t get to sleep for two or three hours. Then after that I tossed and turned all night.
And I’ve consulted Merriam Webster dictionary.
Doesn’t “toss and turn” mean not able to sleep?
"Toss and turn" is most often used to indicate a restless sleep. The idea is that while you may fall asleep, you also move around frequently and don't sleep very soundly.
to move around restlessly while sleeping or trying to sleep