The implant.

I got the implant put in yesterday and I was really chuffed about it. I spoken to my doctor and it all seemed great. I understood the side effects and I'm okay with that. 
But now reading some of your posts it's starting to freak me out. 
Have I done the wrong thing. 
I see more negative comments about it than positive and I'm starting to worry a little now. 
Any advice?