is this implantation bleeding

So I was due to have af on the first and had nothing until day six of being late when I started to bleed it has been two days and it has been significantly lighter than my period but still kinda heavier than I've heard implantation should be I was devistated because I thought I was really pregnant finally anyways today day three since I started bleeding it's just like a little spotting usually I have a heavier flow for four days then day five I'm just spotting I'm just confused if this could be implantation or af bleeding started 13 dpo please help make sense of it