Faint positive day of expected period.

Zahira

I have been having pregnancy symptoms for about two weeks now. AF was due today so this morning I took a PT. Came back very very faint but I can see it. The camera can't really pick it up. At first I thought I was hallucinating but it got a teeny bit darker. But I'm worried that it will turn out to be a miscarriage as before when I kept getting fainter and fainter lines. What should I do?