Hi Im 22. I Have Two Children Already. I Was

Hi im 22. I have two children already. I was a week late for my period & i found out i was pregnant on april 12. I started spotting the next day. The bleeding started pink then went to a dark brown and red over two days. Its not exactly heavy , i can wear two pany liners and be okay without a tampon. Im still bleeding and having mild cramps. Is this implantation bleeding ?!