I do see a chiropractor, but it didn't seem to help all that much. Physio might be an option, I guess. I've never seen a physiotherapist before, but I'll maybe look into that if it gets bad again.
I'll see about those SRC shorts/leggings. I also have varicose veins, so I was a little nervous about getting something that might constrict on my upper legs - don't want anything making those worse! I don't think I've seen them for sale anywhere here (Canada) but I'll check e-bay. Thanks for the suggestions!