Ai, sakit macam ni memang scary kan, especially yang sampai menggigil-menggigil tu, lepas bersalin hormones lagi berubah so it can flare up balik. A few of us mums experienced something similar, rasa macam cramps atau pulling sensation dekat rahim masa nak toilet, tapi tak semua doktor dapat explain kenapa. Since yours is really painful sampai menangis-menangis dulu and sekarang datang balik, I'd suggest check with your gynae again during pantang or once pantang habis, better safe to rule out anything post-delivery, sebab sometimes ada small things yang boleh settle with proper support or care. Meanwhile culit nak tahan, but don't push yourself bertungkus-lumus toilet or jadi constipated, sebab tu memang trigger je.