8 weeks postpartum

I'm just turned 8 weeks pp today and still holding onto 15-17 lbs. But I only bled for the first 2 weeks after having the baby and still havent had my postpartum period yet. Has anyone seen an increase in weightloss once they had their postpartum period? Just wondering if it was possible at all. I've been intermittent fasting and exercising 5 nights a week with no progress from it.