Could I be pregnant?

Savannah • I`m 18 years old trying for my first! Taken by my wonderful man
Last period was May 27-June 1. I am having mild cramps, nausea, backaches, increased appetite, cravings, & mood swings. My period was due Friday. I tested Saturday & BFN. Supposed to have ovulated the 9th. Should I test again? Maybe levels weren't high enough?