late period

Gigi
So I ALWAYS get my period on the Wednesday during my sugar pills, but last time I had barely any spitting Wednesday and then it hit me Thursday.... and this time it's Wednesday night and no sign of period except for tender breasts and the beginning of cramps earlier (took ibuprofen).... I know it's still early and I've had a lot of work this week with finals coming up, do you think it being late is stress induced? I tend to overthink a lot because of anxiety and really don't wanna be pregnant and I have no idea what I would do if I were... anybody have some insight??