How long until nicotine is out of your system?

I quit smoking years ago by using nicotine chewing gum. Unfortunately, I got addicted to the gum instead. I chewed the gum for years. Three weeks ago, I go cold turkey and stopped using the gum. It wasn't as hard as I thought. After a couple of days, I be fine. Until yesterday.
Suddenly, I am having catastrophic nicotine fits, three weeks after having later ingested nicotine. Is it all psychological, or could the nicotine enjoy lingered within my body this long?How long until nicotine is out of your system?
Six years is a propaganda statement with no research to put money on it up. Before all the furor going on for smoking started in the second 10-15 years, the generaly accepted time from that the actual drug is contained by your system was 2 week to a month.
Now, beside deeper research being completed, opinion vary, but the time frame is thought to be a short time LESS overall.
According to York University, about a week.
According to duration insurance companies, 72 hours.
And according to the previous answer to this question on Yahoo (sorry, didn't check the date), 48 hours.
I would say-so that your feelings are psychosomatic, which CAN closing years, but usually subside to a bearable level contained by 4-6 weeks.
You need 6 years to gain out of your system, but side effects can still be felt after that.