usually my blood pressure runs about 134/78..........today, after a 3 day stint with a virus and complete stomach upset, my blood pressure is running lower..... anywhere from 88/66 to 94/62 and the last one was 120/66. Pulse seems somewhat irregular today, and I felt light headed so I decided to take my blood pressure. The machine is about 10 years old, and that could be the problem......don't know.