actual spiritual possession no never been through that, but I have been through the feeling as if I was being possessed/taken over by issues/things/ spirits which turned out to be delusions and hallucinations from bipolar and medication induced psychosis. once I was on the correct meds for my bipolar I no longer perceived myself as being possessed. I do have a past diagnosis of DID but I never perceived those with in me as spirits/ demons taking over my body. in fact the only symptom i had before diagnosis was hearing some of their voices, thoughts but believing this was completely normal, that everyone had voices/thoughts in their heads.. probably because I became DID as a child so I knew no different. After I was diagnosed with DID I still didnt perceive the alters as spirits /demons/ ... I basically thought of them and referred to them as a part of me, an extension of myself.