Hi Jason
Welcome to SR.
None of us are doctors here. We're not a medical board. Your lack of emotion, your low sex drive and your insomnia could be for many reasons.
I don't think it's too much of a stretch tho to suggest that there may be a connection to all the booze and pills you're doing, yeah?
There is a way back to 'normal', but it involves putting down the tequila and finding a responsible pain management and anxiety management regime, and appropriate treatment for your PTSD.
It's not easy and it involves a lot of changes and a lot of work.
You need to speak to your doctor
before you do anything - I cant stress that enough - and tell them what you've told us here.
If they don't listen, you need to find a new doctor or a new therapist.
You'll find a lot of support here too - I hope to see you again
D