Am I out or still TBD?!

I’m 11 DPO and still testing negative. I thought I had implantation bleeding when I was 8 DPO, but the bleeding has continued. It seems much lighter than my normal period & also seems to have started earlier than I would have expected, but my period can be weird. It seems to have lasted longer than it should if it’s just implantation bleeding, but it hasn’t gotten heavier or darker/brighter in color at all. Should I keep testing or am I holding out hope for nothing?