I think I'm crazy, I have very strange dreams and I know stuff I couldn't know

I have a few sorta reoccurring post appocolyptic dreams. In these dreams it's the same place but it changes. I don't have these dreams all the time but when I do they pick up where they left off. Something is always a little different, usually just the way my home town looks. I feel silly but no one I know would take me seriously. My boyfriend tells me I have the shine, I know that's fake right? Actually I don't know that's why I'm here.