So I started my last period April 16th and it ended April 21st. On April 22nd my husband and I had an oopsy so i took plan b first thing on April 23rd. A few days later I started bleeding pretty heavy like a real period for about 3-4 days. As of today i took plan B more than 4 weeks ago and I still haven't had my period. I have taken 2 prego tests and they were both negative. I can't stop stressing out.