Good morning! I am currently 13 DPO and I have been nauseous on and off for a few days, cramps in lower abdomen and back as if I am about to start my period, hungry at certain points and light brown spotting started two days ago. I have 3 trackers and one said I should start my period on 3/4 and the other two 3/6. I have not tested due to the fact the days are off between trackers. Should I wait to test or could it just be PMS?