Cramping but no bleeding or weird discharge

i’ve been cramping since yesterday and they’re not severe and hurt like period cramps but i can tell that they are cleary there. i’m on norethindrone and started taking my pills again almost a week ago. i had sex saturday but i made sure he pulled out but i’m freaking bc the day after i have sex i’m experiencing cramping. can this be a side effect of my birth control and hopefully not pregnancy ??