I've only had precipitated withdrawals once, but it was severe. I had dosed heroin(5 bag shot, my normal shot) at 6:30AM. At 2:30PM I took 4mgs of suboxone because I had run out of money, and was preparing to go a few days on the bupe.
Within a few minutes of putting the half under my tongue, I began to sweat profusely, got extreme chills, and became extremely sick to my stomach. I had heard that the best course of action was to wait it out, even to take more suboxone. So I left work early, lay down on my bed, and decided to wait it out.
The next 4 hours were hellish. Extreme sickness. The symptoms I had earlier were still there, only magnified 10x, and tremors, aching bones, and the inability to keep still had joined up as well. Around 7PM I decided to try to take another 4mgs. It didn't really make anything markedly worse, but it certainly didn't help any. I again decided to try to ride it out.
I spent the night alternating between wishing for death, and sleeping that bizarre dopesick sleep, where you're half/two thirds awake, and dream the same thing over and over. By 8AM I couldn't take it anymore. I called a friend of mine and begged her for enough cash to buy half a bundle. I knew it wouldn't get me high, but I just hoped it would take away my symptoms. Within seconds of shooting up I began to feel better, and within a minute or two I felt normal. Not high, at all, just normal.
The point of me telling this story is that just like a lot of other drugs/pharmaceuticals, suboxone and dope affect everyone differently. A few junkie friends of mine have told me that once they make the mistake of taking bupe too soon after their last shot, for them there is nothing they can do but ride it out. That's why I tried it in the first place.
If you're as miserable as I was, I'd give the dope a chance. It might help and if it doesn't, all you've wasted is a shots worth of cash. I know that's a lot sometimes but it's better than being in the throes of dopesickness IMO.