Implantation or AF?

Seung

I’m two days late but I can’t really trust the app since I’m so irregular (32 days then 43 then 39 then 59 etc). About 5DPO my breasts started to feel super tender and my nipples for extra sensitive. 7DPO-10DPO I felt nauseous few times. Starting from yesterday, I started to feel AF-ish cramps and this morning I decided to use tampon just in case and saw this. Is this “I’m about to start my AF” or implantation? I took a pregnancy test and it was negative 👎🏻