Where the hell do I even start?

Hello,
I was diagnosed with BPD about a month ago. It came about because of a heated row with my wife, again. I got blind drunk afterwards and in the morning I just broke down in front of her and told her I was going to see the Dr for my anger problems. I thought that's all it was, the stresses of normal daily life piling up and causing me to lose my temper far more easily than what I would consider normal. I spoke to the Dr and things were said by me that led her to think that there was more to it than "a short fuse". I was referred to a mental health nurse and after an hour or so of talking she told me she was concerned and thought that my problem was either bipolar or PTSD. The PTSD term gets thrown around a lot in my job, I'm a serving soldier with 13 years service behind me. That didn't make sense to me. After an appointment with a psychiatrist, he told me I have BPD. He drew his conclusion from previous medical notes where I had seen a psychiatrist in 2004 and again in 2012 telling them of similar symptoms. I'm now off work sick for the foreseeable and I'm due to start therapy next month. This whole thing has happened so quickly and has led to me overtginking everything that has happened in my life, good and bad. Sometimes I feel relieved because it gives me a reason why iv had such a turbulent marriage, why I have been through some phases of heavy drinking, gambling, impulsive behaviour ect but on the other hand I also feel like now things are somehow different, that I have this label attached. It has led to me being unable to face going back to work and wondering what is going to happen. I'm constantly worrying about all sorts of things 24/7 and it's driving me nuts. This post probably won't make any sense but I just had to write something because there is nobody I know that could possibly understand what's going on