Dream of snake like cobra during pregnancy

Till today I had 2 dreams of Snakes like king cobra. I am 5 weeks 3 days pregnant. In my sleep I am scared and before anything happens I am already awake. What does that mean? Do any one of you had that? Why all of a sudden snake dream repeatedly? That too such deadly snake. in the last dream there were 2 huge snakes and 2 small snakes. The snake was king cobra but the color was greyish with one black long oval patch on the back below the head and 2 big black eyes.