I doubt that your experience is related to you being a diabetic. I wouldnt dare to say that i understand your experience since i obviously cant, but i propably would have been scared. Something happened there and the only one who could tell you what it was is yourself or the other entity that you did meet. Seems also amazing to me how your dreams are still so frequently.
Btw, that may sound stupid, but i think you really should cherish those experiences. If they appear so often and with such intensity they propably got a great meaning for you. And im not talking about you as in your physical body.
I relayed the story to a priest once, he said to me something I will always remember. He referred to is as "my own private miracle" the meaning and purpose behind what you experienced is between You,God, and the lady in Berlin.
The dreams are basically my life. I mean I have a real life, but the dreams have been a part of my life longer than anything and anyone else outside my parents and siblings. Thank you very much for reading it. If I get brave I will post some more.
oh and for the sake of consistency, the priest only heard the same part of the story I told here. There are not many who have ever heard more than that. He was one of the few I told the story to.