Help!! Am i losing my mind?? Ego-Loss?

I think you are worrying unnecessarily. Taking a few E's isn't going to erode your ego, or change who you are in any way. Your personality is still intact, and you are probably experiencing a bit of depersonalisation, which is a totally normal phenomenon and often but not always related to anxiety. I think you have become fixated on this and got into a vicious circle where the anxiety feeds itself. Having done mive amounts of magic mushrooms, E, and a bunch of other stuff when I was younger, I can say if anything it opened my mind and made me more of a person than anything else. You can't lose your ego. Instead of worrying about this, learn some relaxation and grounding techniques to use when you start to feel dissociated.