Strange bleeding

So I ovulated between the 27th or 28th (can’t remember which) and the 3rd. I am now 4 days before what is supposed to be the start of my period and I’ve been having some bleeding for 3 days (and ended today.) Very light and NOTHING like my period. I also have cramped a tiny bit, again nothing like my period. I’m very confused on what could cause this. Any thoughts?