What does this mean?!?!?

Amanda

We have been TTC seriously since October with no results. I have endometriosis and form hemorrhagic cysts on my ovaries and my reproduction specialist only gave us 6 months to try before we need intervention. My period is usually right on schedule with what Glow says and has only been early one month but never late. I was supposed to get my period yesterday but have only had this very pink light spotting yesterday when I wipe and a dark brown colored light spotting today which is very unlike my period but I am also having a lot of cramps today. With the symptoms that I’m feeling I would be having heavy bleeding at this point. I took a test today and it was negative. Has anyone ever had something like this happen?