Hi there!
I have experienced similar occurances on many occasions with DMT. There's always some sort of reflection of our on self in these experiences - even if it seems like it is an alien occurance. I think that focusing on tranforming the negative into something positve is a good idea when these phenomena occur. There have been times when that is easier said than done, for me. And not all entites or beings will react the same.
And some lessons are later learned.

Sometimes it's good for a change. Other times it isn't.