Jacezz, yes you have PTSD. The good news is that you can, with the appropriate treatment, get back to normal life.
I was diagnosed with PTSD, depression and anxiety in Feb 2013 from an incident i attended as a copper in 2003. Now i will say straight off that my demons were caused by visual not physical like you. I cannot begin to fathom what it would be like for you after what you have been through physically but mentally, I can give you some hints as to how i got my life back. I was hospitalised and off work for nearly two months. Two and a half years later, after steadily increasing my hours, I returned to full time work.
I used to suffer horrendous nightmares and flashbacks. How i countered these was undertaking a course of exposure therapy. This is a very difficult process to go through but one that i would not hesitate in going through again. You are basically deliberately triggering the bejesus out of yourself time and time again in the presence of a psych who is monitoring. The theory is that the more you confront it, the less power the images (for me) and event (for you) has. It works on around 30-40% of people, luckily for me, i was in the 30%. I flashback all the time still but as the images have no power, it doesn't cause me stress. The key to this is to have a really good relationship with your psych.
A mate of mine is undergoing EMDR but is doing it slowly as each time he has a session, he vomits the flashbacks are that powerful. I didn't do this but it is well recommended for PTSD sufferers.
You need to discuss these two with your psych.
Have you got any limitations from the physical injuries? Exercise was enormous in my recovery. I ran and ran and ran, not quite Forrest Gump style but did run heaps. It allowed me to escape. To be by myself and think things through. To set myself goals of just getting through the day. If not running, walking, hiking, swimming, sports, riding. Anything to get the body moving. Body movement is crucial to good health.
Mindfulness, if you don't know about it, research it and do it. Download an app to your phone. I use Smiling Mind every morning and it calms me down & sets me up for the day ahead. It is crucial to my continuing recovery and overall health.
What you are experiencing is pretty much "normal" for PTSD, you are not alone in your journey. If you are not seeing a psych, you need to. Brilliant that you have reached out, well done. Look forward to hearing from you again soon.