Not loosing weight and breastfeeding

Caitlyn
I'm 6.5 months PP and I lost most of the baby weight while breastfeeding except for these last 5 lbs or this last bit of jiggle lol whatever you wanna call it. I'm breastfeeding and working out 5 days a week doing insanity/running and the weight won't budge. I tried to cut some calories but that was a big no no because my milk supply dropped. Anyone else having this issue?