😦 Low BBTs positive pregnancy test?

No

So for the past couple days I've gotten very faint positive tests...but...my BBTs have been low (today's was 97.50) AF is due tomorrow and I'm afraid my progesterone is low or something else is wrong.

Has anyone else experienced low temps when they got a positive test.

I have an appointment to see my doctor on the 2nd so I figured I'd bring up the pregnancy and get a blood test then to make sure everything is okay.