9dpo negative

Rachael • 🤰🏻👶🏻 have a 2 yr old ,

A couple of days ago I was cramping on and off all day and felt like I was going to get my period. I feel like that was implantation because since having my son in 2019 I never get cramps or signs I’m getting my period I just get it, 2 days later and a BFN :( any chance it can still become positive ? Af due in 2-3 days