so i am one week late and the test was negative. i have no symptoms of pregnancy like sore breasts, fatigue, nausea, spotting, etc. and i also have no symptoms of starting my period (like you know how you can just feel it's about to start). could my missed period be from other reasons, like my body just decided to skip this month, stress, recently being sexually active. my body feels completely normal, accept for the missed period. what could be going on and how could i maybe jumpstart my period?