Advice needed!

D

Af was due 3 days ago now, I took a test the day before my period because I just had a feeling but it was BFN 😩 but like I said af is late, I feel unwell, like my belly feels icky, and I’ve got back ache but I don’t know if that’s just from work 😂 do you guys think I should take another test or is af just messing with me!? I’ve also been super emotional, like I cried because I couldn’t get my stupid phone to charge 😂