Confused?? Someone help!

So currently I’m going trough a pregnancy scare. I’m over my tww (two week wait) I’m just waiting until the morning so I can use my fmu for a more accurate test. I went on my placebo pills last Sunday and today I’ve been cramping all day but other than that no sign of my period. I’m wondering if this could be a pregnancy symptom or if it’s just simply my period taking forever to arrive.