Weird.

So my period was 6 days late. Then I wiped and got a little pinkish blood on my t.p. I thought my period came I put a tampon in and went to work. When I took it out 6 hours later there was just a tiny spot of dark brown blood on it. Then nothing for two days. That was Wednesday. On Friday I had like a skid mark of almost black blood. Very little. Then today more brown spotting. NOTHING like a period mine are usually bright red and heavy. Any ideas??