Mine came early too, but I knew that because I used digital F monitor and I ovulated 3 days early.
Good luck this month!
Hey, when did you have your Mirena out?
I got mine out in early January.
My Mirena came out Feb 4th. I got first AF of feb 25th and it lasted 6 days. Now is second AF and it is already really heavy with horrible cramps. Before Mirena I was pg and before that my cycles were always exactly 28 days with 4-5 day periods. I am sure my body is still adjusting to getting the Mirena out.