I have experiences like that though only can recall a couple incidents where I actually 'heard' something usually its more just a feeling of a presence(such as the feeling watched and being followed) and sometimes I've seen beings that do not seem to be of the physical realm. Not sure what cyclothimic is, so not sure what that would have to do with such things.....I personally am not sure these experiences are really spiritual entities/beings or like ghosts or if its just my disordered brain or maybe its both. In my case It hasn't interfered enough in life for me to worry too much. As for your situation if it is psychosis and meds have helped you before maybe that is a good idea...but I certainly couldn't tell you whether its psychosis or if some sort of ability with such limited knowledge as I have.

Do you have a therapist or see any mental health professionals that you're comfortable talking with?