I have a work related back injury and it has caused me to start drinking heavily again...
How is the injury related to your drinking?
The injury in combination with alcohol is making my pain worse.
While it is understandable that you want relief from the physical pain caused by your prior injury, drinking alcohol to do so isn't appropriate. Excessive alcohol consumption will only lead to more health issues in the future and even more physical pain. Instead of trying to self-medicate with alcohol, you should work with a physical therapist in order to remedy the issues you are experiencing with your back.
Fuck it. The country spends huge amounts of money on healthcare and it's not my fault that my back went back to shit.
Consuming alcohol is not going to help you with your back pain. It is making your health worse than it is now. You better go to a doctor or physical therapist.