Hi, Tina and Welcome to SP!
First of all, plateaus happen. You may be on one. But if you love junk food, phentermine will not change that fact. Do you feel you are depending on phentermine to curb your appetite? If so, maybe it's time to focus on the food itself... and how you time your meals, too. Many physicians and dieticians recommend that people have five or six mini-meals daily. You may be a person who would do well with that plan; this would mean a healthy balance that fits into your caloric needs and nutritional balance of carbs, fats and proteins. The key will be in planning so that they fit into your day. Note that you don't have to totally give up foods that are healthy in moderation; just have them fit into your day's nutritional requirements. Tracking your foods here will help you learn how to do that.
Now that you are here, do yourself a solid favor: work through the SP Diet Stages! This series of articles, 'activities, and much more is one incredible tool in helping us re-create lifestyle. Suggestion: when you find yourself looking at an article and thinking "oh, I know THAT", you need to pay extra attention, so focus. The same is true of the "activities". THINK about them. Awareness is the first step toward change.
You'll come across articles on topics of interest, and "Start a Streak" is one you'll find helpful in creating a sort of self-challenge to ditch your love of junk food. www.sparkpeople.com/resource/motivation_ar
For you, the streak should not necessarily be "I will not eat any junk food". Instead, consider what it is about these foods that draws you. Is it your love of sugar or salt? Cravings for carbs?
If quantity is also a problem consider this article about "9 Simple Tricks to Eat Less": www.sparkpeople.com/resource/nutrition_art
SP suggests we set small goals.... and be sure to also set rewards!
Take your time deciding your goals: making them reasonable, attainable.
They are important, and every achievement is worth celebration!
Increasing activity is essential. Walking is handy and since you like walking, do it. Have a pedometer? Wear it at all times, and you will have a good idea of how active you are every day. A little phrase inspires me at times, and periodically I plop it in front of me:
"Move Your Parts!"
SP is a great site loaded with tools and information that will help you ENJOY changes you make. ENJOY THE JOURNEY!