Been running really, really bad on Stars past 6 months.

In a mix of 2-player and 4-man games I'm 106 bi under EV over 3k games. The standard deviation of the EV difference in buy-ins is 0.77 over the sample. Multiply this by sqrt(3000) and you get 1-sigma = 42 buy-ins. And so I'm 2.5 sigma under EV, or 1/166 - something that should happen, on average, every 0.5 million games or so. I'm not generally one for conspiracy theories... but this is getting a bit hard to believe.

Anyone had a similar experience? Any comments as to my Maths being correct, or otherwise?

Thanks guys