See, I'm glad I posted this! When I did my Jillian Michael's vid today, I tried to focus especially on my form. I never bend my knees over my toes, I'm glad to say, and I try to go straight back, almost like sitting in a chair. Unfortunately, my room doesn't have an adequate mirror for that sort of thing.
As for the injury, an unfortunate judo accident, well, I didn't go in to see the chiropractor for three weeks
Due to school and exams and what not. It does feel a ton better, hopefully this is the end of my troubles with it.