Period for almost a month

Maddie • Been with my boyfriend Tyler for 1 year and 3 months and I love him very much.
I got nexplanon implanted in September, in October I got my period and it was fine, no trouble, it wasn't late or anything. In Novemver I got it on the 15th, and it hasn't ended since then. Please someone tel me how I can stop it? I've tried the ibuprofen thing and it hasn't worked for me.