Butterfly,
Do you have a family Doctor? or a family health team? If so go and state the urgancy you have here in getting good metal health. I understand what you are saying. I am not married but have been engaged for 2 years and with my partner for 6 and he still doesn't understand anything about me, or my mind and how I can go from being "normal" to completely with drawn at a simple word or picture etc.
Its really hard to be in a relationship to begin with, yet along one when you suffer from PTSD and your partner has NO idea what it is or how to help.
My therapist used to have my partner in on occation to explain to him what PTSD is, what a flashback is, why someone would have them etc...and that still didnt help him understand.
People how havent been through "rough" patches in life, usually have a hard time understanding why, how, etc of the issues... cause they just dont get it.
Tell you get in to see someone I recommend you research some coping mechanisems.
I use grounding when I get trapped in a flashback.
Other things are like destraction tech. or even breathing... once you find yourself going into a flashback or dissociative state...try to focus on your breathing.... it takes practice but eventually it will snap you out of it...
Hope I was some kind of help