My big toe on my left foot has been asleep/numb for 40 hours?

Not normal....: ... At your age. Better see a podiatrist to determine if you have some sort of nerve entrapment or local nerve damage.

Numb toe: What happened to your toe, was there any trauma? Do you have circulatory problems. You were not using any illegal substances i hope. Is it a darker color and does it feel cold. This is something that could be a sign of something more serious and you should have it checked out by your dr asap.

About time : To see a doctor. It may be coming from a nerve compression in our lower back. Do you have any back issues.?