Period

Siapa sini going thru the same problem dengan period? Me after lahirkan anak pertama 2016 period dtg 2 weeks lepas habis nifas and period circulation normal dan and predictions utk next period tepat. Now having second baby 9 month dan dapat period semula selepas 3 bulan tapi circulation period tak pernah tepat dan teratur. Dapat period 7 - 8hari tapi gap utk next period tak pernah tepat walaupun dah guna apps period calculator. Anybody having the same issues here?