Back problems do not cause the symptoms you are describing. This could be due to an oesophagial stricture, or reflux oesophagitis. Rarely problems outside your oesophagus can also cause such symptoms...but I would suggest that you seek FORMAL medical advice, perhaps an endoscopy and chest X-ray SOON. I have to confess I am not a gastro-enterologist, though. While we have a gastero-enterology forum, I would suggest that you would need better evaluation than can be done on-line.
thinking, thinking, thing....
nope, no good, I give up.