Af 4 days late possible TMI no pics

I am 4 days late but I keep having very light, light brown spotting, only when I wipe after using the restroom and if I do I CM check its also light brown, and after sex last night there was some pink/red blood and I thought I was the start of Af but now nothing. I took a HPT on the day Af was due and it was negitive but the control line was very light. I have been having symptoms, dizziness, nausea, headaches. But those could all go either way. I am scheduling a DRs apt for other reasons so I will talk to them about this is AF still hasent shown up, and I'm planning on taking another HPT if AF dosent show by Sunday, I was just wondering if anyone has experienced this. Thank you