Could I be pregnant?

Annette • Just got my bfp with our rainbow baby 🌈
I ovulated 5 days ago and since 3 days ago my breasts have got very large it's not in my head as there tight in my bra and the aerola is bigger. I started feeling sick today too. Could this be a early sign of implantation? I know it's early as I'm not due on for 8 days but getting my hopes up.