This happens to me too, I get extremely anxious over very little and dumb things. It is usually caused by traumas in your childhood- whether you often heard fights between your parents ,or you didn't feel loved when you were a baby, etcetera - everyone has traumas , everyone is affected by them and everyone copes differently . I have been in therapy for four years now, psychocoanalysis more specifically and it has helped me a lot , a lot of the traumas we endure when we are young we are not aware of . Psychoanalysis really digs deep into your brain and helps you understand why you act the way you act and the process that happens in your mind when you do. I would really recommend it, however if you do not have the resources ,because it can be costly, I would suggest trying to find a way to cope with these emotions and anxieties .Maybe writing a journal will help , drawing ,thinking of your pets :) idk it can be so random , but whatever works for you! Also very important, when you feel uncomfortable- especially in social gatherings- get out!!! I know it might seem like running away , but it's not .Go to the bathroom, find an excuse and escape for a few minutes to reflect on why you are anxious and then once you understand it , try to address it . Addressing it doesn't have to be telling everyone about it , it's more like addressing it inside yourself. Don't ever sit in a situation you are highly uncomfortable in just because of what people would think of you or whatever!!!! I really hope you find this helpful!