Late period after HSG ?

C
Earlier this month I had my HSG done. Everything was fine with it. However, now my period is 5 days late. (I always always have regular periods). Has anyone had this happen to them after their HSG ? I'm wondering if this could be the cause of a late af??
I obviously hope I'm pregnant, but I have a low bbt, negative early detection pregnacy test, and no pregnancy symptoms. So I highly doubt that is the reason af isn't here. (And believe me, my crazy TTC mind always looks for reasons to believe I could be pregnant!)