Hm, all of that with the rippling and everything I've never experienced before, so I can't really offer any suggestions as to what it could be. :\
I have had experiences of feeling like I'm being watched though, and it's mostly when I'm all alone, like in my bedroom or something. These could be feelings attributed to just feeling alone and then getting nervous or something because no one else is around, like you know how the vulnerable victims are in the movies, they get scared out of every little noise they hear XP, but I'm not like that. I love being in the dark, my room is pitch black everytime I go to sleep, and I've never been afraid to be myself. But once in a while, I will just get this feeling that something is in the room with me. It's a really over-whelming sense, that really terrifies me at some points. And again, I'm never like that. I can watch horror movies by myself, in the dark, etc., etc., but just occassionally I will get that feeling that I'm being watched and it will feel like there's a presence in the room. So... I just ignore it.

I pretend that I'm not scared, because I guess I just believe that if there is anything there (kind of a silly thing to think about, but I believe in the possibility of anything, so it never hurts to be safe ;P) then whatever it is will notice if I'm scared, and be more likely to harm me, or something. Kind of like how we think animals can sense fear, and hunt you down or something. But if you show you're not afraid, they'll leave you alone. And I think this is something almost everyone goes through, and it could be just imagination, or perhaps something more.
Anyways, but I have no idea what to tell you about the visions you were having.

Like annsie said, maybe a visit to the doctors can help, or if there's anything else that you think may have induced them, like if you take certain medications of any kind that make you feel strange, or doesn't sit well with you, or something. :\ Sometimes even taking cough medicine can make people feel woozy and light-headed, and perhaps more inclined to see things that aren't supposed to be there. :\
Anyways, I wish you all the best. Hopefully you find out what it is.