anyone else still get their period?

I am 33 years old, and have had Mirena for almost 4 years.I still get my period, and at times though light, sometimes 2 times a month.Every post I see many women say that they stopped getting theirs. Anyone have the problem I have? I also see that I am not crazy when I read many posts about Mirena and side effects. I have been a complete B, if you know what I mean. Tired all the time, hot flashes, bad cramps, headaches from hell and the scariest for me... confusion. Why do we not get told these thing? It is unreal!