I Am A 46 Year Old Female, I Have Been

I am a 46 year old female, I have been on act-disclo-miso 50mg/200mcg for almost 3 months now and I got my period 5 days a go and the bleeding is very heavy and doesn't appear to be slowing down this not normal for me. I have had a headache for 3 days and feel weak and dizzy at times. Is this happening because of the medication I am on