Help! I need advice/opinions. Could i be pregnant?

So me and my boyfriend aren’t trying to get pregnant but we aren’t preventing from having a baby. We just don’t want to get our hopes up by actually putting all effort and time into it. Well i am 7 days late which for me isn’t normal. The latest in my whole life I’ve ever been was at most 2 days late. Now I’m 7 days late with no period symptoms. The only symptoms i have are slight nausea when its time to eat and tender breasts. But today i have some blood it was only a little bit and its more of an orangish pink color and is the consistency of my normal discharge i am wondering if it could be implantation bleeding. But I’ve never seen implantation bleeding I’ve only ever read what it is suppose to look like. Can anyone tell me if this is implantation bleeding or the start of my period?