Vfl worries

Looking for some hopeful stories. I got a vfl on a frer yesterday at 12 dpo (i convinced myself it could be an indent although there was color but it was a real squinter and very faint) and got a negative on a cheapie easy@home. This morning at 13dpo I got a vfl on the cheapie test. This is my 4th pregnancy (1 living child). With my last miscarriage at 7 weeks, I had a vfl at the same dpo so my concern is this means I implanted late or something and that I am more likely to miscarry or have a chemical. Am I just being crazy? I’m scared that history is going to repeat itself.