Crying my eyes out.

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This past week I just knew it.. I felt pregnant, I've been exhausted for no reason, emotional, random kids have literally came up to me and hugged me out of nowhere.. (3 to be exact) my body is achy, headaches.. but still getting BFN's.. I'm 12DPO, I know I technically have a chance still because AF isnt due for 2 days.. but I'm so defeated, I feel like I should have seen even a faint line by now.. I feel like everyone gets a faint line by now.. Advice? anyone got a BFP after 12 days?