Crazy dreams at Grandma's!

I always seem to have weird dreams that take place at grandma's house. I still have no idea why! This time, it was me and what I kind of remember to be my parents. We, for some reason, were hiding from people and I was really nervous about it. I had to go to school and act like a normal kid even though I knew something was up. I had to bring my regular back pack but then I also had a duffel bag...I don't know why. Then two postmen came to the door to give us mail but they could only give it to us if we said people didn't help us (help us with what, i don't know). Then at the same time the postmen were there, a group of teenage guys (none of whom I recognized) showed up too and a couple of them did help us so we had to kick them out so they wouldn't blow our cover. I don't know, it was all super crazy!! At one point in the dream, I think I was a cat and I jumped in the bathtub to give myself a bath....Also I woke up with my arm asleep. That can't be good!