First time on birth control

Divya
Hey guys! So, this is my first time taking birth control (Minastrin 24 Fe) and it's concerning me a bit. I started my pack when I first got my period like my doctor told me to, but it's already been 9 days and my period is just getting heavier and heavier and there's just no end in sight. Normally by Day 3 my flow is way lighter and I'm cramp free, but that's not the case now. I'm just wondering if anyone has had a similar problem and if you have any advice on what I should do? Any help would be greatly appreciated!!