nexplanon birth control

i got the nexplanon birth control out in a couple months ago. i had my period for 3 weeks, then off for a week, then back on for another (roughly) 3 weeks, then off for 5 or so days. and then i started again and haven’t gotten off of it. it’s been over roughly 7 weeks that i’ve been on it. my period blood is a very weird color, it’s gone from dark brown to light brown, then back to the regular color. sometimes thick, sometimes thin. and plenty of clots & what not. has anyone had this problem? i can’t figure out if i should go back to the doctor and have it taken out or what.