Should I give up?

Alice
I am in dire need of someone to tell me not to give up this month. I honestly thought I was pregnant, i had symptoms that never normally come with normal PMS. My boobs are swollen and vainy, i get slight tugging in my pelvis. 
Yesterday i was 14dpo and tested like i have done every day since 8dpo and yet again it was a BFN. That afternoon i had cramps - they felt like pms and i was spotting so i assumed i was out of the game for this month. Now today im 15dpo and nothing! No period, no cramps just really sore boobs! help!!