Hey ladies. So I got my period on August 7th or 8th. I had unprotected sex with my boyfriend and took a plan B a couple days after my period ended. I took the plan b on the 3rd day, 72 hours. I usually bleed a few days after I take the pill but I did not. I bled about a week and a half later towards the middle/end of August. I was thinking I would be okay. Then towards the end of August, I had unprotected sex twice and this time did not take a plan B. It's September 16th and I still have not got my period. :/ could the Plan B have messed up my cycle? I believe I should have gotten it at the beginning of this month. But it could be stress. I've felt nauseous mostly and my appetite is weird. I have little pains in my lower stomach. I think it could be my kind playing tricks on me. I took a pregnancy test on Sunday and it was negative. My body feels different though. Any thoughts?