No. Depersonalisation is NOT losing contact with reality. Its simply that reality seems weird. You still know that a table is a table, despite it's strangeness.
If you are thinking that you might have a delusion, then you aren't having a delusion. Of course, DR/DP can be a symptom of Schizoprenia, but they two different kettles of fish. The most stable, non-psychotic person can experience DR/DP.
Also, in the mind-blowing majority of cases, DR/DP does not lead to psychosis. People must remember this, despite their OCD's appeals otherwise.
If you are thinking that you might have a delusion, then you aren't having a delusion. Of course, DR/DP can be a symptom of Schizoprenia, but they two different kettles of fish. The most stable, non-psychotic person can experience DR/DP.
Also, in the mind-blowing majority of cases, DR/DP does not lead to psychosis. People must remember this, despite their OCD's appeals otherwise.