Wahhh congratulations, but I can imagine how shocking this must be! Since you haven't had a proper cycle since January and you're now pregnant again, definitely kena see your gynae ASAP to make sure everything is okay, sometimes pregnancy baru lepas confinement macam ni kena monitor closely, especially if breastfeeding. A few of my mum friends pun ada experience conception before haid return, so you're not alone, tapi best check with doctor first to confirm dates and make sure you're healthy jugak.