so the low blood pressure warning is real...

I work at a university and I have to switch rooms after each class I do. Sometimes I have quite a hike up stairs. Well, today after rushing all around, my coworker asked if I was okay because I was extremely pale. After she asked I suddenly realized that I was super dizzy and light headed- like I might pass out. I can't move as quickly as I used to. Low blood pressure=1 Me=0