hi this is my first time posting on reddit but something really weird is happening to me and i need to know if its just something i made up in my head or if its happened to other ppl before and its just me being schizo 

so today everyone im close with and talk to is acting... really weird and out of character. ppl are saying im also acting weird and out of character as well.
im convinced ive swapped places with myself from another dimension and thats why everyone is acting so weird.. ppl who are really nice to me are being mean and ppl are mean to me are being really nice... everyone is just acting nothing like themselves and its sadly applying to everyone ive come into contact with today

has this happened to anyone else or am i really just in another dimension? please help