Nexplanon

I want to share my experience and see if anyone else is going through the same thing. I’ve had my nexplanon for about 8 months now and I’ve had all the side effects in the beginning. Periods that lasted weeks,HORRIBLE migraines, sore breasts and so on. But the one I have questions on is whenever I have sex and my husband finishes inside of me I get my period the next day and it lasts weeks! Has anyone else had that problem, if so is there anyway to make the bleeding stop?