Period pain

$Jeny$

Hi all, I have af for four days. Day 2nd is where I have the most pain and that would last around 4-6 hours the other days I get no pain. I have ultrasound in few weeks. My period have always been regular many say though they have regularPeriod they find out cysts or fibroids during ultrasound which causes this pain. Any thoughts ladies? Which days you’ll have pain and how long?