I took plan b towards the end of my first period last month since I had my daughter. I started…

I took plan b towards the end of my first period last month since I had my daughter. I started feeling crampy yesterday and it got a bit stronger today. I'm supposed to have started and these feel more like period cramps than the early pregnancy cramps I had with my daughter... No other symptoms besides light watery discharge and raging hormones... Just cmon period! 😩😩