late period?

so i took an emergency contraceptive at the end of last month. a few days later i started bleeding a little but i’ve been told it was “spotting” because it was very light and didn’t last long. i’m now 3 days late for my period. usually if i absolutely have to have an emergency contraceptive it induces my period earlier instead of later. since it is only three days i know i shouldn’t worry but i overthink anything. if anyone knows what could be going on or what to do, please let me know