Breastfeeding when you conceived multiples??

Shelby • TTC #2!
How many of you, pregnant with multiples, were breastfeeding while you conceived?? Had AF returned before you conceived?? 
We're trying for number 2 soon, and I've only had 1 period (I'm 8 months PP) AND twins run heavily in my family on both sides. 
Just curious if the rumors of conceiving multiples while BF is true!