My doppelganger moment came when on holiday in Spain in my 20s. I'd nipped away from the beach to go to the loo and when I came back, my sister and friends told me how my Spanish doppelganger had appeared when I left... looking exactly like me except at least a decade older with a baby on her hip. She was gone of course by the time I got back.
I remember my first glitchy feeling... I was about 8 or 9 in the back of the car going to school. Suddenly I knew exactly what the next person I saw was going to look like, and there he was walking up the road; an unremarkable looking middle-aged man, and I was excitedly saying "I knew what was going to happen, I knew that man was going to be there and what he was going to look like!"... unremarkable to anyone else, this moment; but I remember it so clearly.
Myself, my sister and my mum all often have dreams that come true. Me and my mum have both had ones where my granny appears and tells us something that's going to happen to one of the family. My latest was when my aunt was ill. I dreamt I was in granny's house, she told me that my aunty was going to heaven but that shortly after that my aunt's adult grandchild was going to heaven too. This was v upsetting and in the dream I could see the awful grief of the immediate family but also feel the peace that it was meant to be this way. I wrote it all down when I woke and it all happened in that order, first my aunt and then within months her grandchild. I like to think how happy they are there together.
One of my first "dreams" was so funny and I really had no idea it was prophetic. We were 15 and had exchange students staying, my friend was having a teen holiday romance with this German student and she was "in love". I had a vivid dream and when I came into class the next morning my friend was later than I was. "Wait til you hear the stupid dream I had last night!" I said, "I dreamt that Rachel HATED Sven (names changed) but that he'd bought her a present of a necklace... and then when he gave it to her she dumped him and he was crying! How stupid is that... she totally loves him!"
Next thing, in walked Rachel and threw her schoolbag down saying dramatically, "I can't STAND Sven!". We couldn't believe it, and he hadn't done anything wrong, she had just went off him overnight. A few days later (they were only here for a week... things move fast when you're a teenager!) we were having a leaving disco for the Germans. Sven and Rachel went out to the stairs... he produced a silver necklace he had bought her! She couldn't live a lie any longer and dumped him... and he started crying!!
There have been so many dreams since then, too many to recount- from dreaming that my friend's goldfish has died, to dreaming that someone was going to have an affair who later did... lots of specific things that came true. But, I actually don't think this type of stuff is necessarily "woo"...time isn't actually linear anyway, we just usually experience it so, but it's all part of the space/time illusion. The nature of reality is certainly weird and I'd love to know more about it, but in the meantime reading the stories on these threads will do!