It's very possible to have a spiritual experience while also experiencing euphoria/delusions. You may recall something about your experiences which has an effect upon your spiritual life.
In my own experience of knowing many people in spiritual communities of various types, a very high percentage of those I know have had "blissful, expansive experiences" without use of drugs -- and also experience mood swings which could easily be classified as M.I. Some others seek/create these experiences through use of drugs, especially "mushrooms."
I, personally, have never known a spiritual leader or guru without conditions very strongly resembling bipolar I mood swings. They are often suddenly on sabbatical or otherwise "protected" from public view when the crash.
Just my own experience with various spiritual communities -- of many types.
I am glad you are safe.

WC