This has to work!

I have struggled with weight most of my adult life. I was always "ok" with it because " I am fat ,but I am healthy." I didn't have any medical issues. Until recently.... Back arthritis almost took me out. Lab work says high cholesterol and If I sleep wrong then, I'm hurt for weeks. This time has to work. I got a prescription for phentermine and I am tracking everything. I didn't realize how many calories I was eating in one meal. Anyway, I have been tracking for a month. I have lose 18 pounds so far.