Im 19 days late, but I am very regular starting the 26 of every month. My last AF was Nov.26 until Nov.29 and nothing since. When I was 13 days late I had a negative blood test with hcg level 1 maybe almost 2. Can I still be pregnant?

Yes it is possible, but not as likely, I would wait till next month, if still no period go to the doctor for a eval.

Also you may want to test very 5 days or so till then,

And I am sure you are testing properly, doing it in the morning as soon as you wake up