nexplanon symptoms?


So i been on nexplanon since february of last year, anytime i masturbate in a certain way "aka fingering" i have a brown discharge that comes out. Also my period is so messed up! When i get it i have it for almost a whole month some days its dark red some days brown. Its starting to make me not wanna have sex anymore bc im scared the brown discharge would come out😩Should i just get off the nexplanon and try something else? If so any recommendations?