Great job tackling this, I know it's so hard at first to even think about dealing with our struggles, but I am proud of you for being so resolved to beat your anxiety!
I know for me personally, when I was really anxious, I lost weight, and it was a bad cycle. I was so anxious that my weight was dropping, because even though I was eating, I was continuing to burn the calories I needed with the stressed-out state I was in.
Your body needs good healthy fats in order to function, and this is especially important for people like us because our brains NEED those healthy fats. When I was really light, I was incredibly anxious, and it just made it worse. I am working with a nutritionist. By following his diet, taking the supplements he has me taking, and also working on the program and learning these life skills, I have gained around ten pounds and feel MUCH better!
As women, with our cycles and hormones, I think it is especially important that we have healthy fats. I have a few friends that are very anxious, and they are both very tiny girls.
Do you think it's anxiety that has you not wanting to eat? I know that when I am really anxious or depressed, I don't feel like eating. It's like I have to force myself to eat.
Here's a few tips that I think may help you to be hungry and also relax enough to want to eat:
1. Try and exercise for even 15 minutes, at a pace that is comfortable for you. This will help to get your metabolism going.
2. Eat breakfast. When your body is not used to eating, it won't be hungry! It's a weird fact, but when your body knows it's not getting food regularly, it won't be hungry at normal times. It's trying to conserve whatever fat it can.
3. Eat fruits and vegetables as a snack. Fiber burns quickly and you won't have that full feeling, but your body will love the healthy calories from the fruits and veggies and it will help to get your metabolism rolling.
4. Exercise outside. There's nothing like being outside in the sun to make you hungry (at least for me, anyway

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5. Do your relaxation tape two or three times a day. This will help your body to relax and will help you to eat if you think it's the anxiety making you not hungry.
I would also look up the affects of nicotine on eating habits. This might be affecting your hunger. I am sure there a lot of great tips and support groups for people who are trying to break that habit.
I hope these tips from my own experience are able to help you!

Many blessings!