I haven't slept good since I quit. I am averaging about 4 hours per night. At first I thought it was excitement or nerves about my quit. As I read more material on this wonderful site I realized sleeplessness was a withdrawal symptom lasting about 2 weeks (everyone is different). Now for the past 2 nights I have had horrible nightmares and woken up in a cold sweat. Is this just another withdrawal symptom? Would you say the 2 week estimation is accurate (for the most part)?