It could be both. You’ve been dealing with a lot. Sometimes when people feel overwhelmed, they try to find something where they feel in control. In your case, that may be the foods you eat and your weight. Of course, it doesn’t really work as a coping mechanism because no matter how much you distract yourself with eating issues, your other issues are still waiting for your attention.
My best suggestion to you is that you take your letter and this response to your therapist. You did a good job describing your problem. Once she knows what is troubling you, she’ll be able to ask some questions to help you verbalize any other concerns you might have. Your therapist has only what you present to her to work with. Since you do trust her, trust her with this. Your therapy will be more effective and you’ll feel better knowing that you aren’t hiding something important from the person who is trying to help you.
I wish you well.