I used to have them too, and I still kinda have them. It is more of a gene thing, but it is also psychological. Don't worry it's ok. You know the worst that can happen is already happening, your anxiety. Try not to go directly with medicine and start a healthy life. Running is the best idea. Running outside on fresh air is the best cure to anxiety, also watch out your sleeping hours and foods. And don't you worry everything is gonna be fine. Another thing that you should do is simply ignore everything that anxiety brings on your head. Don't try not to think about that, let them come and simply watch them. Nothing else. Simply that. Eventually they will either fade away or even come back rarely and not affect your life in any kind of way.