Binaural beats sound interesting. I might give them a go. Now that I think of it: what happens is not just normal pain/ discomfort from meditating, it is actually like burning pain in the spine and neck. It comes with the energy surges, they go hand in hand. Sometimes I will also have this during the day when I'm working or doing whatever (not trying to project), I will start having buzzing, energy surges etc and with it will come this horrible pain in the body/spine/neck. It's just a sick feeling, like you are all achey from a flu or injury. The pain gets worse and worse and I need to get up, move, stretch etc.
Now, this is especially noticable when I'm actually in bed trying to get in the zone and it's kind of stopping me!
Sorry, hope this makes more sense...