Please hold on. You're half way through the worst of it.
My first 72 hours were pure hell. After that, it started getting better.
I celebrated the small milestones. A week was huge for an 18 year dipper. I still felt bad, but nothing like the first 3 days. Two weeks felt even better. After three weeks, I felt I had a handle on it. I can only advise you to keep yourself busy until bed time.
I just crossed five weeks. The nic demons still try and convince me I can have "just one"...
So far, I haven't even come close to buying a can. The memory of the first 3 days is still fresh; I never want to go through that again.
After 5 weeks, I find that I am sleeping much better. I used to stay up late to have another. I'd wake at 2 or 3 and have a chew.
If you need to talk, PM me for my number.