Implantion at 12 dpo.

Anyone implant at 12 dpo and it take longer to get a positive? My last period started on 9/5, my cycles are always 31 days. I had a quant hcg blood test done on Wednesday. I would’ve been 12 dpo, they called me and told me that the results were less than 2. could I still be pregnant, just implanted late?