$50 NL 10 handed graph

[MobbDeep]

I multitable $50 NL Fullring.
Is these "bumps" I have in my graph normal?
When I got the first bump I thought it was my first bad downswing and if I made it thru I could manage anything.
Then a few day later I get another one.
It's about 10 buyins each downswing.
I don't feel I'm playing bad, maybe I have a hard time laying down AA on a non scary board and a tight player raises me on turn and I allways get busted by a set.
And also I allways have the lower set when it's set over set.

Oh well, I've read about it here before, people playing good for a long time and then they have a huge downswing.
So I guess I'm just one of those guys.

Variance is a biatch!