Well, the title kind of describes it all.
If I use my buckwheat zafu for some reason I tend to fall asleep a lot more but I don't appear to have any back pain. When I don't use my zafu I tend to get much better concentration, focus, and deeper meditation BUT my mid back starts to hurt and it gets tight in one spot. I meditate for 45 minutes in the morning and 45 minutes in the evening doing breath meditation(anapanasati).
I sit in half lotus and from time to time burmese.
Things I have tried:
No meditation to get back to a point of no pain nor tightness - Still came back.
Ice and hot packs - it helps, but not a good long term solution.
Ibuprofen - Helps with pain, but tightness remains.
Checked posture on zafu - I could not discern any particular slouching or anything that would cause me to be more sleepy.
Checked posture off zafu - l had my wife check my posture and she says that everything looks good.
Normally this wouldn't even be a problem to be honest, but I am doing a retreat in about 3 months time and it's a 10 day Goenka retreat and although I am confident that I could sit through the pain; it doesn't necessarily mean that I should.
The only thing I could think of doing was taking out some of the buckwheat until I find a middle ground. Any other suggestions?
(FYI I do plan on going to a chiropractor to at least be checked to make sure nothing is wrong)
"Remember you dont meditate to get anything, but to get rid of things. We do it, not with desire, but with letting go. If you want anything, you wont find it." - Ajahn Chah