I am currently 13 DPO and tested this morning with FMU and got the biggest fattest Negative ever

... not even the faintest of faint lines to be seen... and trust me i examined it well

... my question is could i just be testing too early or am i still in with a chance?

My nipples have been very sensitive and i have been having shooting pains through my breasts.. usually before AF i have tender boobs all over.. I have also been urinating more frequently like every 1 or 2 hours... oh ill just add that i used a ept this morning too which is said to be 10 IU/ml... I know i should just wait till AF is due (2 or 3 days) but i am sick of waiting...

Also has anyone got a BFN at 13 DPO and gone on to get a BFP later? Thanks