What do y’all think

So today I’m suppose to start my period it usually starts off heavy and then dies down over the days. Today I got up and used the bathroom and had very light pinkish blood on the toliet paper but nothing else I figured my period Would full on start within the next couple mins so I got a shower ect and still nothing, so when I got to work I use the bathroom again to see and there was nothing. I Keep getting mild cramps off & on but still not bleeding??