My son is 5.5 months ols and is exclusively breastfed. I started my regular periods 2 months back. Does this mean my milk supply may have gone down? Incidentally the return of my periods coincides with the time i stopped expressing. I was expressing since the second week to keep my supply up. Then u stopped around 3 months. My son is a very active baby but has been a thin baby and slow gainer since the very beginning. Even when i was expressing. He seems to be content after feeds and easily manages 3-4 hours between feeds, sometimes more. At nights, he wakes up after 4.5-5 hrs. Some things suggest i should not worry about my milk supply, but then why have my periods returned already? I have heard ppl not having periods for almost 8-9 months.