Asalamualykum dear sister,
Being a 'loner' in your teenage years can be very challenging because everyone has their own little gang in school and college but as you grow older you realise it is okay to be on your own. I think islamically it is an excellent attribute to have. Not to talk as much. The tongue is the avenue to many sins. I was listening to a lecture the other day and the sheikh mentioned if you talk less this is one way of controlling your nafs for the vast majority of people because as social creatures we tend to talk a lot. Another way to control your nafs is to reduce the amount you eat... (this is another topic).
In this world that we live in being quiet isn't a commendable act but in Islam we are constantly told not to talk unless we have something good to say. In reality the person who talks less is the real winner but at the same time sis we need a moderation in everything we do. We can't be in the extreme.
Are you wanting to change yourself? Or are you looking for work-related suggestions to fit your situation?
And I do agree with you. Conventional medicine is NOT the answer.
I found a really nice dua that has helped some people who are in a similar situation...
Try and analyse yourself. Are you more anxious around people you know? People you don't know? A certain character? A certain community?...
Recite Allah's swt. names over and over again and insha Allah it will bring peace to your heart. Know that Allah swt is the Most High and the Most Powerful and He swt can change all hearts and conditions. I guess the more we focus on negativity the more negative the outcome becomes. Try not to focus on the anxiety and focus on the zikar of Allah swt and in time this will help you combat the situation.
I hope this helps. Sorry if my answer is not cohesive.
I wish you happiness and peace.
Asalamualykum