Hey Lilith,
Living in a strongly heteronormative environment can be really rough on people like us. But apparently, the military is rapidly getting better about trans rights. I know nothing about the military, but does it make sense to talk to somebody up the chain of command?
Priority number one is therapy. Are there local support groups? Is there counselling available to service members who are going through divorce? Is the VA bound to confidentiality, and if they are, have you called them for advice?
What are you doing to cope? Do you cross-dress in private? Can you wear nail polish, shave your legs, wear panties or hose under your uniform without being discovered? Play female characters in online games?