please Friends help me to find the question.

I was delivered a baby girl on 22.12.2016 through c section, after 2 months of delivery i.e on 22.02.17 I got my first period as I felt so because it's bleeding...first 2 days was light bleeding but from 3rd day to 11th day it was heavy bleeding and last on 16th day... please tell me is it normal or any problem I have  as I heard generally periods come after 6 months or 1 year as I m exclusively feeding my baby..