Ay, nababagal ang flow mo bigla like that is weird talaga, a few of us moms noticed na ganyan din ang nangyari sa amin, at usually it's either stress, hormonal imbalance, or sometimes kahit pagbabago ng diet or exercise, pwede mag-affect sa cycle, pero ang sakit ng puso mo combined with the unusual flow is something you should really check with your OB para sure kung okay lang or may underlying thing. Best mo talaga mag-consult ng doctor kasi ang regla mo dapat regular pattern, hindi sudden mabilis then patak lang, let them check if normal lang hormonal fluctuation or if kailangan ng treatment, okay?