Faint Positives 16dpo

I have been getting faint positive HPTs the past few days. I have tested using both pink and blue dye tests- all have been squinters but the line is there. If I calculated ovulation correctly I am currently 16dpo. By this point in my first pregnancy I had a nice, clear bfp. I guess I am just confused and concerned that this could be a chemical pregnancy. I have all of the symptoms I had early on in my first pregnancy, but the test lines aren't getting much darker. I'm literally driving myself crazy staring at them. Does anyone have advice or a similar story/results? Thanks!