Period delay and not pregnant

Hello, my period is late by a week. I have been testing twice a day for the past week and it’s all negative. Even today did a test it was negative. I don’t have any pre period pain either. I had two miscarriages this year. I had plenty of sex during this months fertile window. Is there a possibility I could be pregnant??? Does anyone have any idea? Please share your thoughts. Btw my period has always been regular.