I had surgery oct 9 07 and am just starting regular food. I have lost 18 pounds. The problem is my body seems to want to fight me all the way. I find myself very tired and weak at times. I hope this passes. My blood pressure is running low, around 92/63. I saw my primary and test came back ok. Will this pass? Am I just adjusting to a low calorie diet? Has anyone else felt this way? Thanks so much.