Always was shy but that didn't get in the way, I wasn't even aware of it. Quit comfortable up until 11, moved at 11 to another country, suddenly had no friends and felt like an outcast so became depressed and low energy.
At about 15 after my parent's divorce/family split caused me to feel like I didn't belong anywhere and that my safe zone (family) was breaking apart, I became majorly depressed and from that cut off the 2 good friends i had at that time. Was a loner, mostly depression not anxiety
Then the anxiety started to factor in when the depression became so bad that I feel I didn't know where people were coming from when they spoke and acted so energetic and in the moment. I stopped going to school because I didn't feel like I belonged there having 0 friends at all, and it felt weird to not be noticed all day for years at school, so became afraid of all the strangers and the stiffness that comes with it, couldn't relax at class to focus on my school work with all the people around.
Then started the fear of leaving the house to go to school, turned into dropping out, which is when I looked up my issues and was led to SPWorld. Realized the issue
So I began to realize changes at 11, but fully found out the name at 15-16, short answer.