No. The body doesn't even begin to detect hCG the hormone that the pg test detects until after implantation. Implantation on the average is 8-10 days past ovulation. Even if you had a fertilized egg that did by chance happen to implant that early, there still wouldn't be enough hCG for the test to detect. So, save your money and wait another week to test. Trust me, I know it's hard!