birth control
"I had the Nexplanon inserted in February of this year the first day after my last "normal" period.  The first month went well but soon spiralled out of control.  I started breakout bleeding plus I ended up in the ER in March two days in a row from an unexplained allergic reaction, hives all over my body, swollen face etc... Turns out Nexplanon can cause hypersensitivity to other medications and in turn caused the allergic reaction.  Keep in mind the only change I made was the BC. It is now May and I still have the implant in my arm.  Even more side affects have taken place for me.  I have continued to experience hives here and there, sometimes for days on end.  On top of the hive I have had severe mood swings and overall am super sensitive."