Pains in the stomache with cramping

Yesterday I had my mother come to my highschool and picl me up because I was haveing really bad cramps to the point that I just dident want to move.Today I started my period,usualy it starts as a light pink,then earlyer(less that 2 hours ago) I went to change the tampon,and there was a deep red and light pink lump,it looked like flesh.Im really scared and I don't know what to do.Should I tell my mom and have her take me to the Dr.? Or should I wait and hope it goes away,please tell me whats happening to me.

You need to tell your mom she will no what to do.