Well you have got your periods after about 6 days of taking unwanted 72, and the flow was normal ,I suppose. The dates have been early for which you are worried. I think it may be normal since you have got a withdrawal bleeding, which generally occurs after a few days of progesterone
use. Unwanted 72 is a high dose progesterone containing pill named levonorgestrel
.So i don't think you have any chances of pregnancy
, so be assured.
Well your next periods maybe after one month i.e some where around 7th, if previous cycles are regular. Its normal not to have periods on 22nd October. don't worry.