Severe and sharp pain? Yeah, sounds like you did too much, too soon, too hard.
In answer to your question, here is my experience. I used to have a fair amount of back pain as a mountain biker, and it continued later when I switched to the road. And I used to believe, as many riders told me, that it just goes with the territory.
I believed it until I started strengthening my core. Within a few months of very regular exercise and stretching, my severe back pain was greatly diminished and for the most part, just vanished. The only real issue I've had since is if I neglect the workout routine for even a brief length of time. Once you start, you have to stay with it.
These days, after a really intense effort, I may notice a bit of pain, but it's pretty minor and disappears quickly on recovery. It seems quite acceptable to me.
As an added benefit, it seems I can climb stronger and sprint harder, as well as be much more comfortable in the drops.
Of course, there are other issues you can consider. Poor bike fit, bad form, or poor technique, STRESS, unfortunate genes, etc. And there's the Captain Morgan remedy you might want to consider.
