Oo normal yan, mama! A few of us mums noticed na ang 2nd period after birth ay mas unpredictable pa kaysa 1st, lalo na kung breastfeeding ka pa, hormones are still settling down talaga. 39 days from your first period isn't anything to worry about at lahat ng 2nd born ko mum friends, may slight variations sila from their 1st births, kaya don't stress too much about it. But just to be safe, if it takes a bit longer or you're concerned, it's always good to check with your OB lang para peace of mind mo, they can confirm everything's back to normal with your cycle. You're doing great, mama!