I feel like i'm dreaming?

i know i'm awake but at the same time i feel like i'm dreaming, if i'm out shopping or at a club and i look around at people it feels like they are just a figment of my imagination like its not real asif i'm not there.. it's really annoying and it's been happening since i had a dizzy spell last july, ever since that i've been dizzy constantly, i've had blood tests and brain tests but everything came back clear although i do suffer from anxiety. how can i stop this dreamy feeling??