When will I start menstruating after labour?

I gave birth 1.5mths ago and stopped breastfeeding for partially a month so when should I start menstruating? I started 8 1/2 weeks after delivering, I simply breast feed for a month. The doctor said that most women don't start until 8 to 9 weeks and when you breast nurture it extends that. Every woman is different. You can still get pregnant even if you hold not menstruated yet, so be carefull if you don't want to enjoy another baby.
You should start again roughly 6 months after birth. Whether still breastfeeding or not.