So the last two days I suddenly (while sitting at work) will start seeing stars and get sweaty and lightheaded. I checked my BP yesterday (after the first episode I started bringing my monitor) and it was 73/54 then an hour later it was around 106/62. Today I feel like my head is going to blow and like I’m sitting in my chair running a race. I checked it twice today and it is 133/66 and 131/67. Is this normal? I eat every two hours and drink almost a gallon of water a day.