Just want to let you know that you are not going crazy. I thought I was initially like so many that experience this sort of thing. It is because your 'spiritual' centers, some call your higher senses, are opening up naturally. you are advancing. it can be problematic asyou have found and quite fearful or at least it was and is for me at times. the best thing you can do is to ground yourself and raise your vibrational frequency of consciousness. this way, the visions become less problematic. hope this helps. just look up spriitual grounding exercises etc and that will point you in the right direction. hugs and namaste!