Bleeding at week 13/14

Had spotting on Mon, checked with gynae on tues (thank God there is still heartbeat) and cervix check was normal, was prescribed duphaston (3 times daily, can take up to 4 if bleeding continues). Tues night experiencing tummy discomfort (not sure if it’s cramps). Wed night the spotting turned pinkish and eventually blood red (which freaked me out) and went A&E on Wed night and checked, baby is active and has heartbeat (thank God again). No explanation for the bleeding still.. I increase duphaston dosage to 4 tablets per day on Thurs.. hoping the bleeding will stop.. Anybody experiencing the same before? Hoping to hear some views on this.. Im so so afraid of miscarrying and always wondering if my baby is fine.. #pleasehelp #1stimemom