Is it normal binaural beats temporarily deleted my social anxiety

I have for years wondered what caused a certain shift in my personality years ago. I was going on a trip to my school I was studying at from home, going there for seminars. I have had really bad social anxiety my whole life. Before that trip to the school I was so desperate to get well from a flu I had that I took to binaural beats on Youtube. Coincidence or not I got completely well from my flu pretty suddenly. Then when I got to the school it was like my personality had changed. I suddenly had zero social anxiety. I was super chatty with EVERYONE in my class and so confident. Unfortunately this lack of anxiety did not stay, even after two bouts of cognitive behavoural therapy I have never even come close to being rid of my anxiety. Then now I realized the one and only thing I had done differently before that particular trip (I had more trips to that school for seminars after the first one but during those I was my usual quiet self again) was that I had listened to binaural beats for hours. Now I dont know the science behind that stuff but I do know that frequencies has an effect on the brain. My guess is that I listened to it so much that it temporarily rewired pathways in my brain causing my social anxiety to go away. I made this connection now because my throat has been really sore for 2 days and I absolutely cant get sick, its my second week at a new job and I have someone travelling to see me on Thursday with tickets already booked... So again at the same state of desperation as a few years ago I took to binaural beats on Youtube and thats when I realized. I dont know if its even considered possible scientifically that sound frequencies can fix social anxiety but what other explanation is there? I had done NOTHING else that was new for me yet I was such a different person during that trip that its creepy to even look back on, but in a good way... And it had nothing to do with adrenaline from travelling or anything, because its not like ive never done that before. I wonder if I start listening to binaural beats daily if it will change my brain, or if I got lucky at the time and happened across some obscure video with exactly the right frequencies that i'll probably never find again.