Should I find a new doctor? Help.

Hi. I've been trying to lose weight for a very long time. I lost some so far but I have about 50 more to lose but no matter what I do, the weight still comes off much slower than it should so a few friends of mine told me to see a doctor for it.
The doctor told me that Phentermine could help speed up the process but she claimed she couldn't write me a prescription because of so called "state regulations". Instead, she gave me the pills in a little bottle and told me I have to come back every 2 weeks to get them directly from her because it's "illegal to give more than 2 weeks worth of a controlled substance".

Now... I know for a fact that this is not true because I know several friends who get a prescription for it every month and pick it up from the pharmacy so I feel that this doctor's method is giving Phentermine seems a little suspicious to me.

So this will end up costing me $80 every 2 weeks which comes out to $160 a month which is pretty expensive when you compare it to the $15 my friends are paying for their monthly prescription.

I'm just wondering if anyone has heard of it done this way or not because I'm very skeptical. I don't feel too comfortable about carrying around a bottle of pills I don't have a prescription for.

Also, there's a few other things I really find strange about this doctor. The first time I went she barely spoke to me for more than 5 minutes and handed me some papers about her weight loss plan, which included totally ridiculous "meal options" such as "one hard boiled egg" for breakfast or half a head of lettuce with no dressing for dinner... Just completely unrealistic eating. I don't need help knowing how to make better meal choices because I've been able to figure that out on my own since I've been trying to lose weight but I still can't believe doctors are still enforcing these insanely restricted diet plans with patients.

Then she told me to come back a week later after she got the results of my blood work so she could give me the phentermine but when I got there, she was pretty rude to me and made a remark about how I "ONLY lost 3 pounds" and told me to cut out bread/starch completely and drop my calorie intake to 700!!!!

I'm sorry but losing 3 pounds in a week isn't too shabby so I don't really appreciate having my success being minimized like that... and I find it really unhealthy to suggest someone eats only 700 calories a day.

Sorry for the long post but... I just want to know if I'm overreacting about this situation or if I should take my friends advice to find a new doctor. Thank you for reading.