"the only reason this is rated a 7 is because of the effectiveness. i started with the implanon version for about three years; it was great with an occasional bad cramping. i got the next one, nexplanon, and have had it about two years. the cramping is horrendous at times, lasting two weeks or off and on regularly. my periods became a majority of the month by the second year of having nexplanon. i have always had anxiety but i personally feel that the nexplanon is making it worse and i was diagnosed with ibs (for the pain and stomach upset/anxiety). a part of me is terrified that if i take the nexplanon out my symptoms will get worse, but i can also tell you i&#039;ve never had these symptoms until i took nexplanon. be wary."