Growing up with anxiety can be the most frustrating thing to explain to people without anxiety. The way I think about it is that, if you don't have it you won't understand it. People who do not have a dog do not understand the life of people who do. People without siblings do not understand the life of people who do. People who don't have depression do not understand people who do. Just like people who do not have anxiety don't understand people who do.
Anxiety is not something we can control very well. It is a rage that takes over the body and can not be tamed until the one thing that is causing anxiety fixes us. As far as a pit in your stomach, a lump in your throat. People can say "just stop worrying about it" or "why are do you keep tapping your foot". We wish we could stop worrying about it. The little things, the big things, all of it.
The best way to deal with anxiety, find things to keep you occupied. Go take a walk, work some overtime, do whatever you need to do to take your mind off things. If I start to get anxious about something, most of the time I will make a note on my phone telling me to check this or that tomorrow. This helps so much to look the next day at what you wrote down at 3 am the night before and realize how little or stupid it might be.
Taking medicine for anxiety is another way to help. Do not think this is degrading or makes you less of a person for taking medicine. The medicine will simply help your physical aspects of anxiety. It will lower your hormones and stimulate melatonin to calm you down. This is a way to help, it is not meant to be awful. When I first got on medicine for anxiety, I felt so down about myself thinking something was majorly wrong with me. This is not the case at all. The only thing getting on medicine can do is help you. Anxiety does not define you.