Hmm, four months postpartum with an IUD and still may may heavy bleeding like that, honestly dapat i-check pa ito ng doctor talaga, lalo na kung nangyari na itong ilang beses na kasi baka may underlying issue or ang IUD ay hindi properly placed pa lang. A few of us mums had similar concerns after giving birth, and pag may IUD na involved better safe than sorry talaga since yan ay foreign object sa body niya pa lang.