Mental health problems usually show up when we're under stress. I've found that to be especially true of dissociative disorders. For me, I had my first episode of DR when I was 10 years old and living in a very stressful family situation. I was extremely anxious and one morning, bang - the entire environment went unreal.
Those episodes were short, they'd come and go pretty quickly. I was 26 when the DR really began impacting my life. Shortly after the birth of my 2nd child, I was sleep deprived and still battling anxiety. The DR came and stayed.
I hope you get some help from the doctor. It would be great if you can see a psychiatrist and therapist so you can decrease your anxiety level - which theoretically would decrease the DR. I know, finding the time is always so difficult, but dissociation is tenacious. If it's not treated it really digs in its claws.
Let me know how your appointment went.