Condom broke during intercourse.

We were performing the activity in a dark room on 18th June and I was completely unaware of the condom breakage during the intercourse. I remember that I pulled out before the ejaculation but I came to know about this when I ejaculated outside in a missionary pose and tried to pull out the condom. It was completely rolled up to the bottom and I could also see sperm fluid on the bedsheet. I brought an unwanted 72 tablet and my partner took the medicine within 3 hours of this incident. Her last period started on 30th May and the next period is expected around 30th June. The time period when this incident took place was her ovulation period as per our knowledge. For that reason I'm tensed and nervous. It's been 7 days since she took the medicine but still haven't noticed any bleeding. She is experiencing breast tenderness, nausea, and pain in leg muscles now. How much chances are there of pregnancy? I need suggestions please.