dl- trust me, go to a chiro and get yourself checked out. If it turns out to be nothing, then you haven't lost anything. If it does turn out to be something however, the sooner you get working on fixing it the better.
I hurt my back lifeguarding at the beginning of the summer when I was 19 or so. Even though my father has a bad back and so do both my grandfathers I decided to wait til the end of the season to get it looked at.
Later that summer I torqued my middle/upper back lifting because I had no stability due to the injury in the lower back. Again, I didn't think much of it, hell, I was young and young people heal really easily.
Finally got my back looked at at the end of the summer and found out that the lower injury had caused not only the upper, but also destroyed the curvature of my neck. Sweet! Took the better part of a year to fix the lower back, upper's still a little tweaky, and neck cracks like a bitch. This is 5 years after the initial injury and none of it would be a problem now if I'd just gotten it looked at in the first place.
I know you don't want to stop your program now and possibly lose some strength but listen, you're young, you have plenty of time to get bigger and stronger. Think how much it would suck if in a year or 2 you can no longer dead lift at all due to chronic back pain, which could possibly have been avoided.
Sorry for the long post but I wanted to make sure I got my point across