AF DUE AUG 31st!! NEED SOME HELP!

JC
Has anyone ever had a BFP several days after AF? While having negatives prior ?! 
Im EXTREMLY regular ... Pms about a week or so before AF my boobs hurt im miserable ...cramps...has been since I was about 16 same ole routine every time ....
This time I have nothing my boobs ache randomly at different times ... And my TEETH! Are so sensitive right now it's weird this has never happened ?!?! Has anyone ever has achy teeth in early pregnancy ?! 
Please ?! And thanks !