Google Analytics Help

I don’t know if this is the correct forum or not but I have a question regarding my google analytics. The numbers on my google analytics are dropping drastically. Like fast and furious. I am not sure why because I post every day sometime twice or three times a day and Unique content. I can understand my unique visitors numbers going down but why would my visits or pageviews go down. Don’t those stay the same or go up? I thought visits were counted every time someones goes to my blog? Or is that per month?

On a side note is it possible someone could be tampering with my analytics? I do have an enemy out in the blogesphere and wonder if they could be behind it?