Why I'm in a slump

It's no secret that I'm in a pretty major league slump. I've had only one winning session in the last six, instead of my usual four. This slump clocks in at #7 on my all-time list of six session cash game no limit hold'em slumps; here are the top 10 (the first value is the amount of money lost, and the last value is the number of winning sessions):

   -308362 2011-06-16 2011-06-24 (1)
   -299874 2012-01-18 2012-01-26 (0)
   -299800 2011-12-30 2012-01-06 (0)
   -290200 2011-06-11 2011-06-21 (2)
   -265200 2012-01-17 2012-01-24 (1)
   -243900 2011-06-14 2011-06-23 (2)
   -233682 2013-05-19 2013-05-24 (1)
   -222312 2011-12-28 2012-01-04 (1)
   -217800 2011-12-29 2012-01-05 (1)
   -210862 2011-06-20 2011-06-27 (2)

It's also no secret why I'm in this slump. My recent sessions are simply too long. I need to take the profit when I go up by at least $5,000, but I just can't seem to pull the trigger. Tonight, I promise to take the profit early, if I get the chance.

During current Hold'em session you were dealt 157 hands and saw flop:
 - 22 out of 25 times while in big blind (88%)
 - 18 out of 25 times while in small blind (72%)
 - 64 out of 107 times in other positions (59%)
 - a total of 104 out of 157 (66%)
 Pots won at showdown - 13 of 26 (50%)
 Pots won without showdown - 15

delta: $-25,864
cash game no limit hold'em balance: $4,983,366
balance: $7,432,774