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

About time . To see a doctor. It may be coming from a nerve compression in our lower back. Do you have any back issues.?
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.
Not normal.... ... At your age. Better see a podiatrist to determine if you have some sort of nerve entrapment or local nerve damage.