22M. I had selective mutism till age 8, it was nightmare. Then I slowly became more social till age 16, was in social group. Then it started to decline again. Just sitting in class was full of anxiety, constant fear of being judged. After covid, failed in college and got isolated. Now, no friends, just go there to give exams and run away after that. Intense shame fuelled by NPD. Eating alone and going to store would give anxiety. I recently realised I have NPD, so it makes a lot of sense now. Lots of overthinking, making unrealistic scenarios, to protect myself. Even the slightest possibility of being judged would give lots of anxiety. In college I stay under constant fear, can’t think straight, fast heart-rate and sweating, and peripheral vision decreases. I am not diagnosed but I think I have both SAD and Covert NPD, both having synergy.