Changing length of cycle after Mirena

Has anyone experienced a change in length of cycle after having an IUD removed (Mirena)?
I had it removed this past March and was pregnant right away, then miscarried at 8 weeks. I am coming up on cycle 3 and cycle 2 was only 24 days (due in 5 days). I don't feel my regular pms symptoms and I'm wondering if I am pregnant again, I want to test soon (glow says I can test tomorrow- assuming my cycle is actually 24 days), but I don't want to see the BFN :( 
Any personal experiences to share?