My last period was 01/13/2017 I haven't been having any cramps like I would before my period. My breast and my back hurt, had the worst head ache yesterday, been very tired lately, hungry, but idk if my period is late because it's been kind of shifty lately. My apps say AF is 3 days late. My fiance doesn't want to get a test yet since my period has been weird. I'm on cd31 and 17dpo. should I rest or keep waiting?