I agree with jdfisse, try and keep a little busy.
You're going to feel bad no matter whether you're in bed or at the grocery store. I'm not saying go crazy and have a full busy day, but try and do something. A load of laundry, a quick trip to the grocery store for things you may need (if you're not puking your guts out, that is). But don't try and do too much. Be easy on yourself and rest if needed. Remember you will feel better so soon. I know it doesn't seem like it and the hours are dragging by, but they will pass and you will be better. Temporarily relieving yourself by using will only make you have to go back to day 1 all over again. How many times do you want to do this? That's the thought that got me out of my cycle of using...I couldn't stand to go through "day one" again..Ive already been through so many. One thought I had that kept me going is the thought that I would feel better tomorrow. Even if that wasn't true, thats what I told myself....tomorrow will be better. It helps you keep going just one more day until eventually you are right. One thing that also has helped me is being trying to appreciate what I have and be thankful. I decided to become clean before I lost my job, before I lost my home, before I lost my friends and loved ones. I decided to become clean before I was facing any kind of criminal charges related to my drug use. I got to get clean at home in the comfort of bed instead of a freezing cold jail floor or shitty rehab in the middle of nowhere. Since you're posting online, I assume you're not in rehab or jail but other factors that I was thankful for may not apply to you..but if they do, think about them and be thankful. And know that if you begin using again you may not be so lucky next time you try to become clean. And there will always be a next time, you won't be able to keep doing this forever, that is, unless the drugs kill you first. Good luck. I'm on day 11 (13 days since I decided to get clean but had a little bit of drug use the first 2 days), and feeling good again. Sure, not everything is perfect, but thats life anyways. it will be again and I'm getting closer and closer to it. And so are you if you remain strong!