Anyone had different times for return of period after different pregnancies?

After my first it was like 8 mos till I had a period. Now it’s like 11 weeks and I think I’m having a period?

What would account for this? I’m only 5 lbs from my starting weight. I wonder if weight has something to do w it? (I once read in the past when trying to get a period to get pregnant to eat a lot to make ur body think there’s surplus. What I’m saying is I don’t really have surplus right now, Im pretty in shape). I think I’m producing more milk this go around. I am (as I was before) EBF.