Hi Doctor, I Had Sex With My Wife On The

Hi Doctor,

I had sex with my wife on the 1st day when her period started i.e 16th November 2015 and later she had an i-pill just to avoid any chances of pregnancy.

Her bleeding time was increased as a result of pill and she had bleeding till 24-25th of November.

Normally she has had max menstural cycle of 30 days and min of 25days.
But then even till today 21st December 2015 she hasn't experienced even a bit of bleeding.

Although I had heard about safe sex period and did according to that only but still she hasn't had her periods coming till now..
So can there be chances that she is pregnant ?? Incase she is I'm worried I'll have to go for an abortion !!