Horrible emphasis on that, dream help

Ok I had this nightmare and normally I know im dreaming but this one was so vivid I woke up exhausted and afraid I dont even know why it was scary can some one tell me if it means anything?, ok so I’d been out, I dont remember where and I was returning home with my sister and a woman who’s face I couldnt see was driving us home in my grandad (who I have issues with irl)’s van, when we got out we saw a woman hugging sheep and then we had to run to close the gate ( I live in a converted barn) because the cows were out and they were because spastic almost possessed, then I had a bath but I kept leaving th ebath room because I was scared of the water (I fell into a hot bath of water scalding my whole left leg 9 years ago but I havnt been afraid since) then I went to my room to find there was a rat trapped in my jewellery box and you could see its sillouhette totally freaked out, my mum deals with it (and she is a huge whimp like me) then I see my brother chasing me around the house with the rat trapped in my clear art folder which I know can open easily so I was screaming and felt like I was being sufficated as my brother kept pushing the rat in my face, I woke up feeling completely exhausted and still screaming, I woke up to an empty house which is an old barn and 6,000 sq ft, my family doesnt usually go out without telling me ,and I wanna know if it means anything I dont usually believe in this stuff but I am freaked