Confusing dreams with reality?

Question

Sometimes I feel like I'm losing my mind. Does this happen to anyone else?
I have some dream, not particularly vivid or memorable, but it contained some important detail, (eg. so-and-so started dating so-and-so, or so-and-so's brother died), and I wake up not remembering it in anyway, but then I found myself on the way to work feeling really really sad, like, what a pity, he was a good kid... and wondering why my roommate was taking the news so calmly, it probably hasn't hit him yet...
wait... did that actually happen? surely he would have mentioned it? 
Then I go and check Facebook, and sure enough, I imagined it all. But my despair felt so real?
Thank goodness forFacebook...
But I feel like I'm losing my mind. It all  reminds me of when my grandma had dementia and had reality all mixed up.. if I didn't have Facebook, how would I know what happened and what didn't to people other than me? How could I believe a dream so readily?

Answer

It happens to me constantly. A couple days ago I had a dream that by bff died (I can’t remember any other details at all) and when I woke up I went to text her and tell her about it and was like “wait... she died.” *starts crying* “wait. Did she though?...” so I texted her to find out and she replied 😂 “oh hey, I was just mourning your death. Glad you’re back” my friends don’t even really react to it anymore, they are so used to it. I also talk about things I’ve done and people I’ve met and then realize it was all a dream wayyyyy later and have to be like “disregard everything I said to you earlier. I don’t think it actually happened 🤔” they aren’t even vivid dreams. And I never truly remember the dream, something will just feel kinda off as I’m talking about it or thinking about it and I’ll be trying to figure out where the hell I got it from, and then I might get small flashes of the dream. 
But I’m also psychotic (have to take medications for hallucinations and delusions) I’m not sure if this is a symptom or not tbh, but it started happening around the same time the other symptoms did. At the very least you could probably consider it a mild-moderate form of derealization. (Which everyone has to some extend. In the mildest forms it’s day dreaming or spacing out, in severe forms it’s delusions like thinking your family is not actually your family, but people who have kidnapped and brainwashed you)