Hi mommy! Ang irregular periods mo especially after breastfeeding, plus the weight gain and painful breasts, deserve a check-up with your OB talaga, it could be PCOS or something else entirely, pero kailangan ng proper diagnosis at blood work para malaman, hindi lang pag-asa. A few of us moms in my circle had similar experiences after breastfeeding and turned out it was hormonal imbalance or thyroid stuff, so please don't self-diagnose at get checked muna bago mag-crash diet, okay? Weight loss will be easier once you know what's going on with your body, and your doctor can help you with a safe plan especially if you're still producing milk or healing from the breastfeeding. Kaya mo yan, mama, sending you strength!