"i&#039;ve had the implant for 2 years now. i was on my period when it was inserted, and i didn&#039;t get off of that period for 5 weeks. other than that, i loved it at first. i did have some mood swings, but i thought it was just normal considering the extra hormone in my body. well, it got worse, and a few months ago i was put on medicine for anxiety. (can&#039;t say the implant had anything to do with it, but it is possible) i gained 28 lbs, and have read that it can mess with your thyroid (hence another reason for weight gain, other than retaining fluid). i&#039;ve had high blood pressure since this was inserted. but, i have not gotten pregnant, so it did its job."