Anyone else?

So my boobs got super sore around when my period was due. I ended up being 3 days late and then started I bled about a medium flow the first day & then it slacked down to about a panty liner for a day and then 2 days its been dark like old blood & Now stopped at the end of day 4. The blood was never bright red more of a darker. My period usually lasts around 5 days heavy the first 2 & slacks down and I have super bad cramps. This time my boobs have just been sore that usually stop after i start but they are still sore. Anyone had this happen? Just a change in cycle or what?