Af late

Jessica
My period usually starts on the 6th I'm late so I took a pt and it was negative but AF still hasn't came I have unusual periods BTW it will stay steady on the 6th for a few months then just be all outta whack anybody know why I'm 30 years old TTC for 2years now no luck did have problems with Morena IUD think maybe it messed me up??...Ugh