My doctor started me onthe lower dose i think it was 15 mg when i woke up after 3 weeks i had not lost any weight so my doctor had me take the 37.5mg pills in the mornings. that was 2 weeks ago and i have only lost like 4 lbs total. What am i doing wrong. I cut out all of my soda intake. SOmeone said i might not be eating enough can this be true?