I’m a 19 year old female and have Obsessive-Compulsive disorder (although this has never been diagnosed, I’ve suffered with this since the age of three and is something my family and I have always accepted) and am also prone to anxiety attacks and bouts of severe depression. Lately, after drinking excessive amounts of alcohol (I rarely drink alcohol, I occasionally do binge drink in social situations though) or vomiting for any other reason, I “hear voices” in my head. There can be just the one voice or many voices either talking to me or each other, although they are always well meaning and comfort me whilst I am vomiting or otherwise distressed. I am aware that these voices aren’t real and they are not auditory, more like an inner-monologue that I am not consciously controlling. Recently though, I became another person entirely (whilst being aware of my true identity) and was being lectured by this persons mother. These aren’t people I know or knew. When this happens I become extremely confused and disorientated, and have very little control of what I say or do. It is like being in a dream and being aware that it is a dream but not being able to wake up, instead having to watch myself. It usually lasts approximately for an hour or two hours, three at the most, however it variably goes through strong parts where I am completely taken over and weak parts where I can block the thoughts out and function properly throughout this time.
I know that hearing voices is a sign of Schizophrenia, and that it is possible to suffer with both Obsessive-Compulsive disorder and Schizophrenia at the same time, although I have always believed that Schizophrenics lost touch with reality, whereas I am aware of reality, although I have little or no control over my thoughts or actions when this happens (I do not become a danger to others or wish to cause anyone harm, although am potentially a danger to myself by not being in full control of mind or body), also this only seems to happen whilst vomiting or after drinking alcohol (this happens about 8-10 hours after drinking so I am therefore always sober by the time this kicks in) and also sometimes after being suddenly woken up.
Is this normal or is it a symptom of Schizophrenia or any other mental disorder, and also are these hallucinations or delusions or confused thinking? I would be very grateful for anyones opinion.

Thank you