Ay, normal yan usually lalo na mixed feeding kasi hindi fully breastfeeding, so mas mabilis bumalik ang period, a few of us din experienced spotting in and out before it settled into a regular cycle, kaya don't worry too much! But since it's been four months na and you're still getting those random bleeds, better check with your OB para sure lang, basta peace of mind, lalo na with CS recovery pa yan.