My husband also has severe back pain in the lower left side. To be 27 and have all this suffering is hard to understand. Please don't feel that this is from anything you have done. If alcohol causes this, I'd have died at 22! Jesus said that Heaven is better than anything anyone has ever seen or heard in this life and that 'My Father's house has many rooms'.
I think you're going to get a really good room... just don't get lost.