Prednisone and period

lovely_lillies

I was on a prednisone taper for about a week and I’m not on day 37 of my cycle. My period was supposed to be last Sunday but hasn’t come yet. All negative pregnancy tests and I have all the period symptoms but still no period yet. I’ve been off prednisone for 12 days, anyone else experienced this? Also received the COVID vaccine two weeks ago, not sure about that effect.