Hello, on February 26th I had taken Plan b one step ( The morning after pill) 12 hours after intercourse with my husband. Well during the next 2 weeks I’ve had horrible side effects since taking the pill. I decided to take 6 first response pregnancy test every day for 6 days. They were all negative. I decided to take two more tests the day of the appointment with my gynecologist which were also negative. The same morning my gynecologist gave me a urine pregnancy test at his office which was positive. How is is possible if I had 8 negative tests including that morning and his urine test was positive???