Please check your thyroid gland check. I had sublclinical Hypothyroidism.
See how hypothyroid causes DP --->
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3961955/
Before I had No thoughts , Empty Mind, No emotions, Poor Short term Memory. Now nearly Everthing is healed, I am happy now. Please Please Please get your thyroid checked.