Hi, I have been using oxycodone for past 4-5 days. in past i done oxy onle 8times and it was 2 months ago. I never have withdrawals of any kind so iam worried. What can i expect ? Its been 18 hours since last dose and iam feeling depressed, lightheaded, and overall weak. How long will it lasts ? also i have school tomorrow ... any information will be helpful. Thanks