Please please help me understand

My husband and I are TTC. Idk if this is normal but according to GLOW, my last period was 30thTHUR-SUN 3rd. I had sex on all my most fertile days. My period is currently due (MON-THUR), im late basically bc i haven't started yet. I have regular 28 day cycles n this is my first late period. I have no pms symptoms. Idk if i should test in a week or what. I thought i was experiencing pregnancy symtoms up until today. Now i feel nothing and sad. Just need guidance..