Cramping/very slight pain 5dpo

Mary
Ok so I've been pregnant twice and both times i had cramping during the early weeks...but i don't remember it bring this early...i just had a saline ultrasound done after my period , that was cd 8...anyone else having these cramps/very slight pain...honestly it feels like my period is about to start, period is is 7days...Any thoughts? Should i call my doc and ask her, or would you just wait for period and see ifit goes away?