birth control
"I started Nexplanon August 2015 after I had previously been on LoSeasonique birth control for 7 years, which gave me periods every 3 months.  The first 6 months on Nexplanon were great, no period!  Then I started getting cystic acne, deep painful acne under the skin that wouldn't go away.  I tried everything to get rid of the acne but nothing helped, my OBGYN said it was hormonal due to the implant.  Then I started getting irregular periods, and it was dark brown and clumpy.  Fast forward to February 2017, my acne is down to 2 bumps at a time but the periods start and stop without notice.  Some days it'll be so bad that I even get cramps.  Is it great that I don't have to worry about taking a pill? - Yes.  But the side effects suck."