If you are concerned, then speak with your GYN. Like I said before, I know it can take 3 months for your cycle to be regular again. Did you have regular periods with the Mirena in? Some don't. Give your body time to adjust since it isn't being exposed to hormones from the IUD any longer.
Today is now the 26 and I still have not bled. Is that normal?
My cycle stayed the same after my Mirena was removed. I did bleed for a little longer than normal the first month afterwords. They usually say it takes 3 months for your body to be fully regulated after switching or changing any form of birth control.