w$woSD

hi just wondering if anyone can give me a decent w$woSD. Might be a weird question but by looking at my stats it looks to me that one reason i am not winning as much as i could is because my w$woSD is to low, so im guessing i might be a bit passive postflop and fold to much or call to much. Either way it looks bad to me. Its only over a 3k sample size over the past 2 weeks and i am quite a bit inexperienced with using HEM so this stats has never come to my knowledge. So ya anyway its -22.52 when my net amount won is 20.84. I have been on a losing streak all week and before that when i was around 1800 hands and running hot last week it was around -10 to -12 and my net was between 30 and 40. stakes i am playing are 10c/20cL and 2c4cnl, i have been especially running bad in the nl.