losing weight after baby with pcos

Hi all I lost over 3 stone last time here then fell pregnant which was amazing after 4 and half years of nothing we are now blessed with a lovely little one but ive gained 4 stone since ive fallen preg I gained three in pregnancy but lost two as soon as I had baby but since then ive put on two more but over all about 4 stone total gain from prepregancy weight. Now the problem is I want to lose weight and get fit again but im still breastfeeding and I started jogging and doing dance wii workouts im going to see the doctor to get advice but anyone else had a baby with pcos gained alot then managed to lose weight whilst still bf? Any support or advice welcome