You can also go see your doctor and request a blood pregnancy test, I had to to that to find out because my hormones were so low at first. Good luck!
You may still be testing too early. Some women don't produce enough hormones to let the body they are pregnant. Wait a few more days or if you can wait a week. Have you had any spotting? Which can be implantation bleeding...not all women get it but it can be a good sign that you are pregnant
The same thing is happening to me.
No period and negative tests.
I know how you feel.