Blood vs urine

Br

I had unprotected sex during ovulation & he finished in me. I ended up taking a plan b, but at the time I took it I did not realize I was already ovulating so I don’t the plan b actually worked. My period is now 12 days late. I took a test around 7 days late and it was negative, but I am having quite a few symptoms. I am fine with with either outcome, just curious to know y’all’s thoughts. I have a gyno appointment in two days which I will be getting a blood test incase I am just having low HGC levels. What do y’all think?