I have exactly the same symptoms as you. The past 3 months were complete hell for me. I still think that I might have some serious mental illness and that still makes me scared, which I think that is the main cause of my dp, however I stopped researching the symptoms so frequently now and I am slowly getting better thanks to exercises and maybe the antidepressant I'm taking. I do believe dpdr is completely related to fear. Once we don't fear things anymore and don't get scared with ourselves, we get rid of dp. A thought that is really helping me is that nothing is permanent, not even life... so I can't be like this forever. Another thought that is helping me is that everyone and everything dies, and so what? This is not a big deal. We are part of this planet even of we don't feel like at the moment and like everything else that is alive people get to an end too. These thoughts make me feel more grounded and more relaxed.