Hello Friend, Good that you are seeking a help. Yes, you are right. Your symptoms are sign of social anxiety. As you have developed such impression since childhood, you need to undergo certain behavioral therapies, self therapy, few lifestyle changes to overcome.
Better consult a psychologists to do a detailed assessment and identify a suitable solution that you can follow.
Next Steps
Feel free to reach out to me online through Practo for further detailed evaluation and suitable solutions. Be confident. You will be alright soon.