I guess Star Wars is bad for the back because I too have had problems. This is the first time it has felt decent in a while. Ady just don't force your back to pop. I went to a clinic with my dad when he had a bad back and they said that is the biggest mistake people make. I used to lean back in a chair to pop mine and I still had pain.Take a HOT bath with Epsom salt for a good week. And also sleeping on your stomach for a week or 2 might help. Don't put pressure on that back.

There is also an excersise I learned in ROTC that helps it quite a bit.

lay on the floor (carpet would be very good.)

wrap your hands around your knees and roll back and forth. It should releive it quite a bit. Only do it if it is regular back pain. If it is spinal problems I would see a doctor if possible.