What's going on?

Taylor
I'm currently fifteen days late, although I know plan b can definitely delay your period/make you even miss it. I had unprotected sex and he came in me on February 19th at like 2:30 and 5 in the morning? I took a plan b at 4 pm the next day. Then on wednesday night/Thursday morning the 15/16 I had sex again but I don't remember if he used a condom or pulled out (I was drunk... I don't feel taken advantage of or anything I know drunk consent isn't consent but we both were and I knew what I was doing). My last period was February 7 and there are usually 29-30 days in my cycle. I haven't had any of my usual PMS symptoms aside from being emotional, and I experienced light spotting 2/25-2/28. The student health center did a standard cheap urine test on 3/8 when I was a day late and they let me go so that would mean negative. Now I'm super fatigued, have headaches, dizziness, nausea but no puking, sore breasts, and my skin has cleared up (when I'm PMSing I break out some and never have sore breasts). Are my hormones still just way out of whack from plan B? It was my first time taking it. These were only my second and third times having sex (college changes you) so I will definitely be getting on BC assuming I'm not pregnant!