Did I read that correctly, are you 20 years old?
Edit: NM just saw your birthday.
It's normal to be trying to figure things out at 20.
Not to mention you still have the brain of an adolescent. The brain doesn't really fully mature until your mid to late twenty's. Anxiety and those extreme emotions tend to stabilize over time although there are steps you can take to make anxiety less powerful.
For me eating well and exercise were the two most helpful things. Buy it's also important to remember the brain is plastic and you can rewire it with enough effort. I really enjoyed books like "This Spake Zarathustra," "Emotional Intelligence," "Siddhartha," and really anything politics, psychology, that really helps solidify your view of the world, the human condition, and how the mind work.
When you have a more clear image of yourself and the world it is much easier to walk through confidentially.
Also, if you take notes on what your the stressors are that set off your anxiety, you can try an adjust your habits or use systematic desensitization to help.
I used different medications here and there, but ultimately they were temporary fixes and really they were most useful in allowing me to see outside of the normal boundaries I place on myself to be more creative about what options there are.