Oh fuckit. My downswing was over 12x buy-ins at $50NL. It did hurt a lot. However, I did have a break, examined my play a bit and am playing way tighter then before (I'm now 18/14 instead of 21/11. At last I'm playing at +7BB/100 at $50NL again.
Hope not all of the downswing happened at $100NL.