Today im supposed to start my period.

Hawley
I've been keeping track of my periods for a while now. I've always started a day or two before its projected. But I was supposed to start mine today and I haven't had cramps or anything I normally do before I start. Should I be worried.... I know my boyfriend would be ok if I was pregnant but I don't know if I should bring it to his attention yet and it end up being nothing..