late period?

ok sooo, i’m four days late and received negative tests. at this point idk what to do. the first time i tested was 1 day late. i also tested today and still negative.

i haven’t really been stressing lately so i don’t understand why it’s late 😩 could it be that my whole schedule has changed? i’m a full time student and worker and my day usually started at 7:30am. i have been furloughed so i wake up between 9-10am now, latest 12pm.

i feel slight cramping and fatigue. i do have back pains and bad headaches. i just want answers 🥺