Negative tests but LATE PERIOD

Okay so I'm 27dpo and 13 days past the day I was supposed to start my period. I took a clear blue digital just a few days ago and it was negative.. about 8-10 dpo I had some very light spotting/bleeding just twice in 2 days. That is ALL I have seen since then, so my first thought was implantation bleeding, yet, got a neg test after that.. I have been bloated and nauseous just here and there. I've had occasional headaches (not that bad), and lately some mild cramping and pretty intense pain in my breasts, especially my nipple and around it. Does anyone have ANY suggestions? Cause I am just so confused at this point...😭😓🙏🏼

UPDATE: I'm still late on my period. SOMEONE PLEASE HELP??!