Me and my boyfriend don't use condoms and I'm not on birth control. We know what can happen. My brother and some friends started saying I was glowing a couple days ago. My period is 2days late now and I took 2 test and they came out negative. I started feeling tired in the middle of the day, my boobs are hurting and my nipples got darker and bigger. I started feeling nauseous and started using the restroom a lot more. Is it possible for home pregnancy tests not to work for some ladies ?