Are my nightmares trying to tell me something?

[Bonitaluna]

This entire week I've been having nothing but nightmares, the first nightmare I had occurred in my house, all I remember was seeing snakes on the ground trying to get to me and my family, they were small and huge, some were on the ceiling and walls, they had big scary eyes. The second nightmare on the second day involved big black wolves with big teeth, they were chasing my family and I. This other nightmare on the third day had to do with needles, I could see myself getting a needle and feeling pain afterward also seeing my own blood, and last night I had another dream, I can't seem to remember it though. I searched everywhere on google and in dream dictionaries, I can't find a simple answer, is something bad going to occur? is this a sign?