im 4 days late no period but lower back mild ache please help

That's a sign of pregnancy

but no any other symptoms like nausea

this mild ache how long it ll last

I didn't have nausea or morning sickness my whole pregnancy with my angel baby , sometime you don't have any symptoms and can still be pregnant

im in the same boat as @nikitha ii am 4 days late yet no symptoms..

Did u take test?