Aw mama, yan talaga ay concern na kailangan i-discuss sa OB mo because thin endometrium while breastfeeding for that long is something they need to monitor closely, it could be related sa prolonged breastfeeding and hormonal changes, pero dapat talaga sila ang magbigay ng proper diagnosis at plan. You're doing such a great job caring for your baby for two years, and now it's time to care for yourself din, your OB can guide you on what steps to take next, whether it's addressing the thickness or checking for other factors. Hang in there, mama!