I recently stopped my birth control 4 months ago, looking to start a family. My allergies started bothering me so I went to the doctor and she gave me a kenalog shot. It turned out to be bronchitis so they prescribed me antibiotics two days later. Within 5 days I started my period and it lasted for 10 days. Since I have been off bc they have been averaging 7 days. I stopped bleeding heavily, but not I'm still spotting 5 or so days after I stopped my cycle? Can the kenalog shot do this?