BFN or should I try again ?!?

got a BFN when I tested a few days ago ... still no period yet I'm getting period cramps still .. tender ies, they don't hurt though .. they ache a bit .. I was really hoping for a BFP! Idk what's going on .. my period was been supposed to come since the 14 .. I did bleed [implantation, I supposed] I don't remember which day .. but it was two weeks ago according to my question on implantation bleeding that I asked .. emmm what's going on?