About 2 months ago on March 4th, I took a plan b. About a week later, I believed I received my period which lasted 4 days. I don’t remember it being light, most likely medium or heavy. Either way, I knew it could’ve been a side effect or it could’ve just been my menstrual. i didn’t stress it. Until I never got it in the month of April. I waited for another month. It’s almost the end of May. I took a pregnancy test last week, it came back negative. I’m not completely sure what is going on with my body. Here and there I would feel mild cramps but its never severe. I just finished my first year of college, so I was very stressed. I gained freshman 20, but I’m not sure if that’s a cause in my delay. I’ve been wondering if the plan B has caused my major delay. It wasn’t my first time taking one but I took my first plan B over a year ago. Has anyone ever experienced anything like this? Any long term side effects? Could this be serious?