I received my first kenalog shot around the 25th of May. I was du...

I received my first kenalog shot around the 25th of May. I was due to begin my period around the 1st of June. I have always had regular periods. Since this shot, it seem like I was going to start like normal. There were signs of red and brown blood. For around 3-4 days I would bleed very very lightly. Then, now going on for about 3 weeks I am continuing to spot bleed. The blood seems to be old blood, because it is brown. The only thing that has been different to my body is the shot. I am assuming it is from the kenalog shot. My doctor did not tell me that this would occur.