So confused

Chanie

I am currently 24 days late. Have not had any BFP.. Took a test and I think it’s invalid, retook and got a BFN. With my son, I didn’t get a BFP until 60 days after my period. Posting the pic of the invalid test.. (I think).. Cramped off and on for a week or so and today I thought AF was here, but it only lasted a little bit and was very light flow with dark blood at the end. Still waiting to see if AF reallly shows or what???? Doc appointment Tuesday at 3:30