Dream about spiders? :(?

Ok this morning around 5 I woke up from a dream about spiders. In my dream, i was talking to my mom about the bands we were listening throughout the day and we were laying on a futon in my dark living room under some covers in front of a white wall. The white wall had a huge window at the top of it with a blue blanket covering the window. It was a night so it was pretty drk. Then as me and mom were talking this HUGE fat spider came running down the blue blanket where the window was and jumped on the futon where me and my mom were. Then it jumped on me and I started freaking out and I went to grab it and it started biting me an i was screaming. Then another spider jumped on the futon and my mom was yelling at me to kill them but they were biting me and yeah. I woke up horrified because in reality I hate spiders. Why would I have this dream and does it mean? Thanks.