Like for one somewhat crappy example I'll be thinking, "Oh I really need to..."

and then my mind goes blank. No idea where my train of thought was going, what I was going to think, nothing. It just goes away. It's like someone simply comes into my head and takes the thoughts away from me before I can finish thinking them.

My sister noticed it yesterday because we were talking and I kept stopping mid-sentence because I'm having trouble forming complete sentences because my thoughts are randomly disappearing/stopping. She's not the only one that's been noticing, anyone I'm around a lot has commented on it. This is why I like to be alone because.. and it happened again. I don't know where I was going with that sentence.

It's really weird, and frankly it's scaring the **** out of me and I don't know why. I'm really confused and this is hard, I don't know what's going on really except that things seem they're getting worse but idk..

Has this kind of thing happened to anyone else?