Thanks you guys for all the advice! I would love to get my bike fitted! Currently, it's not an option financially, but perhaps in a little while I could get that done. I also have pre-existing low back pain from a cheerleading accident in high school. haha... that sounds so funny to me, but I caught a girl wrong once and heard my low back crack, and was out for a little while due to that. So even now, 7 years later, if I stand in one spot too long it starts to hurt again. I really only stretch after riding, so I'll start stretching before and during and see if that helps. Luckily, I love stretching!!