Can I take diet pills at my age?

okay so I'm 17 and I know you have to be at least 18 years old to take diet pills. But I have tried EVERYTHING! I am on a diet and I am regularly exercising, and don't get me wrong I am losing weight, but I want to lose a lot more in a faster pace, so I'm considering taking diet pills.my mom says "there's nothing wrong with my body, you're at a good size for your age, and you're healthy" but I still don't like my body like I want to. so should I try out diet pills?
Can I take diet pills at my age?
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