Ok here's the update. Had a cat scan and a cysto, which is a procedure where a urologist shoves a camera up your ding dong and through your prostate. Anyone who hasn't done this before, you are missing out on some good times. The cat scan didn't reveal anything too alarming. Just a small lesion in my right kidney that is most likely nothing but will require follow-up scans every 6 months. No kidney stones. The cysto revealed a totally healthy bladder. So no tumors or cancer. So basically I attribute it to over-exertion on my rides. Now I have 24 hours of painful ruination to endure and I'm in the clear. Fun fun.