Feeling defeated

So I took phentermine 2 years ago and lost over 40lbs. I loved the phentermine because it took away the food noise and made me crave water. My new doctor started me on it again this year. 1 month in and have only lost 2lbs. The food noise is still there and im not craving water this time. Im so confused. So I had my follow up with my doctor and he said there's no other options. Im at my highest dose and my insurance doesn't cover mounjaro or any of them. He said your just going to have to do it the old way, no carbs, no sugars nothing. Im so upset and just feel defeated. Idk what to do. If dieting on my own was that easy I'd of lost the weight awhile ago. Guess im just having a pitty party. Im so angry at myself 2 years ago I went from 204lbs down to 160lbs. I kept the weight of for the longest time. I did great until the beginning of this year then I just let myself go.