New pills

Was on dasetta (bc pills) before. Stopped for 6 months and just started again. This is time for period 2 on the pills but no period. It's 3 days late. Last month was very very light. I have felt crampy and grumpy as usual but no flow at all. Not even any stained discharge like usual a day or two before my period. I missed the last 3 active days of the pack. Didn't have sex except on pack 1. Am I just overreacting to the fear of being pregnant? Is it just the new meds? I'm worrying a lot.