"i have had nexplanon twice. the first 2 1/2 years were great. i never had a period or any other side effects. when it came time to get a new one put in, i bled for months at a time. so, i got a new one put in and it effected me completely different than the first time. i bled constantly for months at a time. i had horrible anxiety and mood swings. for example, i would freak out on my boyfriend when he wasn&#039;t even doing anything. i didn&#039;t feel like myself. i actually had to get on antidepressants. i finally got it taken out of my arm yesterday after this went on for 6 months. i just don&#039;t understand why the first time i had it was so great and the second time was terrible. nexplanon definitely can cause terrible freak outs and constant bleed"