Long very heavy period with Mireana

Elizabeth
I just got my Mireana like a month ago and I've been on my period since. I think this is day 22, I'm slowly losing hope that it will ever stop. I've had a couple people tell me that they had the same thing but my doctors never said anything about prolonged periods and google searches don't really help. This is also the heaviest period I've ever had. Ever. Can anyone help? I just don't know what to do. I have a doc appointment coming up this week but I just want it to stop.