please tell me what’s going on...

okay so, my last period was 8/29 .. i think i ovulated around 10-12th which were cycle days 13,14 . I went to the doctor a week later & had my progesterone level checked to see if i ovulated & I did , my levels were 6.59 ... I took a test Saturday which had a faint positive , & I took cheapies which were negative . Also took a first response which also came back negative .. what is going on ? I was due for my period today & it didn’t show up .. IF i am pregnant how far am I ? Am I testing to early or what ? I’ve been having symptoms as nausea after almost every meal , when i wake up , dizziness , & sleeping a lot more than usual ...