This is the most major side effect of the powerful psychoactive drug Methamphetamine. Since you have been on the drug for 6 days now, it would be wise to visit the emergency room at the earliest, have your vitals checked, and be admitted short term. Going without sleep for more than a week can result in death, so I hope you understand how serious your state is. You will also experience rebound sleep, a phenomenon that occurs once the drug wears off. This is sleep that can last upto 72 hours at a stretch. Lastly, my sincere advice to you would be to be admitted in a rehab and kick the habit for good. Good luck.