Mood improvement on nexplanon

Hey all, 
I'm two weeks into my nexplanon implant and so far it has been great! I was on a combined pill before and it gave me beautiful skin....and headaches and mood swings. I honestly thought that it was his life was! 
Since starting nexplanon, my mood has been pleasant and stable and my headaches are gone. I'm very pleased but worried this won't be permanent. Has anyone experienced benefits from going off estrogen? I know this is  specific but I wanted to hear other experiences. Thanks!