Hello mam, thanks for trusting health care magic.
There are nil chances of pregnancy
if you had unprotected sex only around your period dates.
Intake of norethisterone
can derange periods at times but it will revert back to normal in some time.
can be due to sexual activity after progesterone
intake which causes softening of cervix so it will also come back to normal in a while.
In case you have any other question you can consult me on health care magic.
Dr Manisha Jain
take care and wish you all the best.