3 week period!! Not wanting medical advice

Almost 2 yrs ago i got the nexplanon and for 8 months i bled for 3 weeks at a time with heavy bleeding for the past 9 months ive had my regular 5 to 7 days still heavier than before i had this BC. Anyways over the course of this 3 weeks the bleeding has gotten much much worse to point today i was at work doing housekeeping and had huge clots coming out. I contacted my doctor who can't see me until Monday. Im freaking out and im going to ER when my bf gets back with the truck but i just wanted to see if any other ladies with the Nexplanon has experienced this kind of period?