78! That's about 75 more than most people stick with it! :-)
Way to keep yourself accountable with public posts.
As for back issues, have you ever tried some light stretching/yoga before bed and/or when you wake up? A few simple stretches can make a huge difference in how you wake up feeling. A pillow between your knees if side sleeping is helpful as well. And there's always the age of the mattress to look at. Just some thoughts. I hope your back feels better quickly!
I use the pillow trick, I have never been big on Stretching, although I just did a couple little ones prior to reading your post. I think it will be good to go again for tomorrow, its already feeling quite a bit better.