Period due today....

Lydia
Hey! 
My period is due today so I took a test this morning and bfn....however I really feel like I'm pregnant this time. Really tired, cramping in my lower abdomen, weird metallic taste in my mouth and the main symptom being that my boobs aren't sore (my boobs are ALWAYS sore from around on ovulation to AF). This is the first thing I noticed as a possible symptom 
Anyways, is it possible that a test isn't showing up yet? On the first day of missed period? When should I test again??