my period is never ending... PT 2

I have been on my period for what feels like an eternity. But actually almost three weeks. This has happend to me on my last cycle... I went to the doctors and he said it was a hormone imbalance, and to take ibuprofen. This sucks!!!!!!!  
Any tips?
I've been using the nexplanon implant for about 2 years and this is the first problem I've had with it, other than that I love it!!
 
I still occasionally get cramps, breasts always sore sometimes random sharp pain. 

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