getting help losing weight

I want to lose weight I've never been this heavy. I've gone to my Dr and got blood work done, they tell me everything is great and in range, so nothing is wrong with me. I am slowly changing eating habits and drinking habits I've tried jumping in and I failed multiple times. my biggest question here is has anyone tried adipex or Phentermine? I tried contrave but it made me sleepy and not motivated. I've heard adipex or Phentermine will give me energy and boost my metabolism. I've seen results first hand but I'm not sure if I should just ask for it at my doctors or just hint around to it. saying things like I'm low on energy, I'm tired, my metabolism is slow, or should I just ask for it straight it out. what doctor can prescribe it and how long can I use it. I know it's a temporary medication and you aren't supposed to take it long term. any advice is welcomed and I would love to hear any thing you ladies have to say. TIA