Period hasn't returned...

I'm 9 weeks pp and still no sign of AF. I'm not complaining, more curious if anyone else is having a similar experience. I bf until about 4.5-5 weeks. So it's been about a month, but still no AF. One of my breasts does still leak though, not sure if that would be enough for my body to think I was still bf. I thought it was strange and wanted to see if anyone else has stopped bf and how long it was before your cycle returned. TIA!