So I had unprotected set with my partner on March 25 at 6pm (my period ended March 24). March 26 I took a plan b within 18 hours of having sex. About a week later I bleed for 3 days with it starting to be brown and getting red over the course of the 3 days. I took a pregnancy test on the first day of bleeding and it came out negative. After the bleeding, I haven’t had cramps or anything and haven’t seen any changes in my health. I took another test April 14, and it came out negative as well. My period was suppose to come on April 16, but nothing has happened. I feel like it might be stress because finals are here, but I need a second opinion on this. Could I be pregnant or is this the plan b delaying everything?