Late period and negative tests

Tanisha

Hello! I got my last period of June 13-19 and ovulated on July 5-6 during which time we TTC. I expected my period on July 13 and it’s July 19. I have always had fairly regular periods ranging from 30-32 day cycles. I have never been this late but I have taken three pregnancy tests - one on the 13th because I was eager, one on the 16th, and one today the 19th. All 3 say negative. Here is a picture of today’s test. Is it possible I am pregnant and detecting too early or have low levels of HCG? I also had extremely light bleeding yesterday where it appeared from what I read could have been implantation. Please let me know what you all think! Thank you in advance for your response!