Very confused

Alma
First time posting and would like to know if anyone is going through a similar situation or it has happened before. My AF was due Feb 5th. Started spotting very lightly on Feb 6th but it was only when I wiped. The spotting only lasted till Feb 8th. I thought AF was arriving but the spotting was light pink and the flow never increased. Also, my breasts get really tender and sore a week before my period but they haven't this month. As of today, AF has not arrived and it's odd because my cycles are normally regular. I've had mild cramping on and off with some pinching sensations since AF was due. I have also experience some constipation but I'm not sure if that's a sign of PG. I did test with a blue dye and got a very faint line but then a few days later I tested with a pink dye and it was negative. I'm very confused because I have never had spotting like this before and don't want to get my hopes up. I do have an appt next week with my OBGYN but wish I could know something sooner. Is there a chance I could be pregnant? Thanks!