Well done you for asking the question, I know how hard it can be to even admit to a problem.
I think with or without a diagnosis it might be a good thing for you to speak to someone (you can get a mental health care plan from your doc so it doesn't have to cost you anything) and you may be able to learn enough to get you through the anxious times. We all get them, but they don't have to be debilitating.
Also, websites like beyond blue or mood gym may be useful for information or exercises.
Good luck girl, we all have difficult times, it's just a matter of knowing when to look for help x