Weird...I got my monthly friend today , Lol.
Anyways...That's normal. We all go through it. & TRUST ME , It's not the worst day of your life...It only last for a few days anyway..
I it can be tough at first but it is nothing to freak out about.
it is about a year later so I will give you advise you will experience. If you have it then all these things happen and your stressed out, You will continue to have it. sometime it will leave with 2-4 hours of just relaxing will a book not TV if you barely watch it and off computer. Or sometimes you will have to make right with others.