12 dpo but bfn w/symptoms

I am currently 12 dpo and I have had so many unusual symptoms. From 6/7 dpo I have had some mild cramping ( gone now), full pressure feeling in my uterus ( if that makes any sense), sore tender nipples and exhaustion. I have taken a test at 10 dpo and 12 dpo with a bfn. Has anyone had this and end up with a bfp?? I seriously feel as if I am but it isn’t showing up. Maybe I’m grasping at straws or I’m just psyching myself out. Any help appreciated!