Super late period

Hannah

I’m 28 and a mum of two. My period has always been 32 to 42 days but not longer, EVER! After my last period (August 25th) my partner and I thought we might try for one more and if it happened it happened. Well now it’s been a 114 days since my last period! (I’ve had all negative test so I’m not pregnant) but where the F has my period gone?!!!