Hi, I'd like to help you with your question.
It is a matter of addressing your fear as a singular feeling rather than as individual fears. When people have anxiety and fears, they focus their fear on any number of objects, people or situations. For example, some who is fearful may fear cats or they may fear bridges. What they fear may be different, but the feeling that causes the fear and the answer on how to resolve it are the same.
What you need to address is why you feel afraid and how to cope with it. Anxiety and fears are, at the root, about how your body reacts when you are faced with what you fear. Adrenaline is released when you feel the fear (you feel you are in danger) and this causes you to react as if you were. That reaction is what causes most people to develop fears. The become overwhelmed and feel they are going to die or have a heart attack, both of which are far from the truth. The way to counteract this is to learn how to control your reaction, where it comes from and how to see it for what it is- harmless.
You mentioned that you are in therapy and on medication. Are these treatments helping you? The therapy alone should be helping you to feel better. Talk therapy has shown to be highly effective with anxiety, phobias and fears. If you feel you are not better, you can try another therapist. Finding a therapist you feel helps you and that you are comfortable with is much like finding your family doctor. It may take a few tries, but you will click with someone.
Also, because fears and anxiety are so common, there is a lot of self help available for you. Here are some resources to help you get started:
The Anxiety & Phobia Workbook by Edmund J. Bourne
Anxiety, Phobias, & Panic: A Step-by-Step Program for Regaining Control of Your Life by Reneau Z. Peurifoy
The 10 Best-Ever Anxiety Management Techniques: Understanding How Your Brain Makes You Anxious and What You Can Do to Change It by Margaret Wehrenberg
You can find these books on Amazon.com or your local library may have them for you.
Let me know if I can help in any other way,