Pregnancy test results?

9 dpo is too early. You're actually 11dpo (April 28 to May 9 is 11 days), but that's on the early side too. I had positive tests at about 10-11 days with my pregnancies, but it was a VERY faint positive on a very sensitive test. I would try another test in 2-3 days. Also read the packaging that came with your tests and see how early it says it will work. Good luck!