rattlesnake dream

Last night in the haze of dreams that I dreamt about, I remember dreaming about rattlesnakes. I didn't really see any of them but I remember there were multiple hidden all around me and I could hear them giving warning.

supposedly they represent the passage of time when they show up in dreams but it could also refer to someone who is callous or not to be trusted (one of the many meanings of snake). 

i wasn't scared in the dream, weary and careful where I stepped, but not scared and I wasn't bitten or attacked. just heard the rattles of several snakes.