Emmotional rollercoaster

Yesterday my period was 3 days early. And was definitely the worst emmotional roller coaster in my life. I was getting angry for tiny insignificant things . and then getting really emmotional because i knew i was being irrational. Crying alot. I had a 3 day assembly and its very formal and important so i had to look the part. But i just felt like i looked ugly and fat the whole event. . I was just a huge mess. Feel 10 times better today. Has anyone felt that way? Or am i Crazy?