You only describe your product as having a low mp - what was your expected mp, and what was the measured mp? Was the measured mp broad (as in melting over several degrees range), or sharp? Is the compound active, and giving the expected effects? Was the mp of the PCC used in the synthesis correct?
Are you sure about the identity of the chemicals you used to create the PCC, and that of the Phenylmagnesium bromide?
If they for example sold you p-tolylmagnesium bromide instead, then your product would be pure and psychoactive, but exhibiting another melting point, as it wouldn't be the correct compound.