Michael Myers chased me and when I tried to call 911, I accidently called 611.
In general, dreams in which you are being chased represent a fear or anxiety that you are struggling with. Michael Myers is a fictional horror character, so his appearance in your dream may symbolize some kind of danger or threat that you feel is lurking in your life. The act of trying to call 911 suggests that you are seeking help or protection from this danger, but accidentally calling 611 instead suggests that you are having difficulty finding the right resources to help you.
Overall, this dream could be interpreted as a reflection of your feeling overwhelmed and vulnerable in the face of a perceived danger. It may be helpful to explore these feelings further and try to identify any real-life sources of fear or anxiety that could be driving this dream.