Hi MattMVS7, I have had the same worries like you. You cannot be in a constant state of panic, it is physically not possible. The adrenaline which causes the panic feeling will eventually burn off. If you can, try to move around in order to burn off the excess energy quicker. Breathing techniques also help to manage a panic attack, or even prevent it from happening. You could lie down on your bed and place one hand on the stomach, and the other on your chest. Inhale slowly through your nose and push your stomach out. Then let your shoulders relax when you exhale. You could try counting if it helps you. Count to 7 when you breathe in and count to 11 when you breathe out. I personally tend to hyperventilate when i panic, so it takes me a long while until I manage to get to 7-11, but slowly it helps me relax.
I don't know if you have a therapist. It sounds like you could benefit from a therapy where you can talk about whatever is going on in your life and how your anxiety manifests itself etc. The important thing is to continue to find ways to address your anxiety and don't give up. There is always something that helps minimize the anxiety, we just have to find out what helps us most. For some its meds, for others its acupuncture..Keep trying