It sounds like you're dealing with quite a lot... As far as the gambling goes, is there any kind of trigger that makes you feel like taking gambling risks? Is it anxiety, boredom, or just a feeling that you want to beat the place?

As far as the therapy goes, as 1Flag mentioned your sexual orientation probably wouldn't be a factor in PTSD, which means that one possibility is to see the Vet Centre therapist and simply not mention it, if you're worried about what will get back. Or you could see someone outside the Vet Centre, if you're not comfortable there...

Hope this helps in some way.