implantation bleeding or Period?

Aleisha • Mummy To 2 & Wife To Be 💙👰🏻
I'm 19 days late for my period! Took pregnancy test last week came back negative. I have tiny dots of blood on tissue when I wipe, can it be implantation bleeding or period. Doesn't go into my knickers just when I wipe (not all the time) advice please! Thank you!