I am 4 weeks post gastric sleeve. I have followed my physicians plan and instructions and have healed, and am eating soft diet still. I am trying to get 48 fl. oz. of water each day, but am having a difficult time. I was 236 lbs. pre-surgery and have lost 21 lbs. I am experiencing low blood pressure, 96/54, which simply exhausts me. I am taking all my vitamins, and am getting 50 -50 grams of protien per day. Has any one else experienced low blood pressure and a lower heart rate? If so, how long do I expect this to go on, or is there anything I can do to about it? It is affecting my performance at work.