Did 1.1 miles on the Parkway

I ran and walked 1.1 miles today, going south from 100th South. I felt good during the run but felt dizziness afterwards. I'm wondering in my blood pressure is low. I've always had BP of about 110/70, and when I was a kid it was common to feel dizziness for a few moments if I got up quickly. However, I've never felt dizzy after a run. As soon as I find my BP thing I'll check my BP.