Hmm.... I don't carry stuff in my back pockets, and I haven't used my camelbak yet. While riding it's slightly worse on the left, but there's pain on both sides. The lingering pain feels like a pinched nerve, and is only on the left. Who knows if it's even related to the riding.

The leg length discrepancy is a good one. I don't remember if the bike fitter measured both sides.

On the handlebars, I'm pursuing this with the store where I bought the bike because they're not charging me anything to swap out parts. If that doesn't do it, then I'm on to other avenues that will start to cost $$.

Thanks melissam and Triskeliongirl for your ideas, I appreciate the help. It's a puzzle.