I am 26, and Have been treated for high blood pressure in the past. I should add that I am 6 1 and weigh 340lbs. The last several days my blood pressure has been quite low. 92/62, 91/63, 99/60, and I even had one that was 107/100. Sometimes, it feels like my heart is beating really hard. Not fast at all, if anything it s beating slower than usual, but when it happens I get really tired. Not sure what to do, or what it might be.