Possible symptoms

Has anyone ever gotten this weird feeling in their chest sort of like heart flutters during their early stages of pregnancy? I’m currently 11dpo and I’m trying to wait until my period to retest. As of now i continue to get my BFN so I’m hoping and praying that my period doesn’t show in the upcoming days. This morning i felt the cramps in my stomach like my period will be starting soon but I’m not quite sure if it’s just late implantation.