What Causes Delay In Periods And Fatigue?

Hello,My period is 3 days late,took pregnancy test 4 days ago and it came out negative.Still no period or period symptoms.I am 37 HV had a period since 12 I know my body.My lady parts feel extremely wet and I think ok my period started go to restroom still nothing.Feel sleepy a lot but other than that no other pregnancy signs.I have 4 children and with 3 of them I never had pregnancy symptoms. Should I retest??Or wait few more days.