I’m so confused......

8 days late on my period....had a blood test done last Thursday that came back negative and multiple at home pregnancy tests.

Other people have said it could be where I quit taking my birth control but that has been 6 months ago...and my periods were regular up to this point. I have NEVER been this late. I know all my tests are negative but I can’t help but wonder if they could still be wrong? I think maybe my blood test could have been taken too early because it takes 6-8 days past conception for a blood pregnancy test to show up, and I had the test done only 5 days after sex.

What do y’all think?? Any advice would help. I’m just feeling so confused and worried. Also, I have no pregnancy symptoms except being grossly late for my period. My last period started June 9th.