Is this dangerous?

So I had the implanon put in about 8 months ago and had my period for the next 6 months (non stop heavy flow) my doctor then put me on the pill on top of the implant and it stopped the bleeding. But I have just reached the sugar pills (period week) and my flow has been soooo heavy. I have passed three egg sized clots on top of another one that literally felt like I was laying an egg. I don't see how I could have accumulated this much lining after 6 months of non stop bleeding?? Has anyone had any experience with the implant and the pill, and has this or anything similar happened? Just want to know if it's dangerous, Thanks 🙂