why can't i get my BFP

M

Well today I was 13 dpo. Got my BFN and I swear it gets harder and harder every month. My hubby and I even used pre seed this time and nothing! why is it not working for us? I'm not sure how many more negative responses I can't take! How long did it take you Ladies to get pregnant... and the ones that got it in the first 3 months, please just pass on by. you won't understand how this really feels.