13 days late

I am sexually active and I am CD44, AF was due on CD 32 so I am 13 days late I have not taken a test but I do have an appointment on Monday to see my local doctor so if AF has not arrived by than, I will be 15 days late.
I have experienced cramps for the past 3 weeks which is abit odd for me.
has else anyone experienced this?
thank you for sharing your thoughts x