I think you've done REALLY well to have lost 10kg already!! That's fantastic!

I was amazed at how difficult it was for me to lose weight while bf. Some of us just aren't able to do it as easily as others. I think your body likes to hold onto some of the extra to keep those stores there for bub. It actually took me a whole 12 months to lose it all after I had Em. But like the others said, don't stress, you have plenty of time.