After some additional research, I've discovered exactly what (in my lay opinion) is wrong with my back and hip. The piriformis muscle is a tiny little muscle in the hip that helps turn your hip outward. It happens to run next to the sciatic nerve, which is the largest nerve in the body running from the spine to your feet. Some doctors theorize that when the piriformis is too tight it can pinch the sciatic nerve (aka piriformis syndrome). I happen to agree with that theory. Once I found this stretch and spent all day stretching, the pain went away! Unfortunately a lot of the other muscles around the top of my thigh still hurt, but I think it's because I've been using other muscles to compensate for the bum hip. Try these stretches out and see if they work for you.
Since I've been able to alliviate a lot of the pain I was in, I'm no longer freaked out. I will still make an appointment to see the chiropractor just to be on the safe side, but I think the Peachtree will be okay. I may have to walk some of it, but that's okay. The rest of this week will be rest and recovery, which means I won't know what to do with myself on running days LOL.