Implantation or period?

My period is due in 3 days so I’m around 11/12 dpo.

Went to the loo this morning & when I wiped I saw a little pink blood on the tissue when I wiped, I thought UGH OKAY period is here. No cramps. And since then nothing.

My boobs have become so sore for the last week but I really just put it down to AF symptoms.

Anyone else ?