Rethink your sentences before saying them. Prepare them in your head. For me i had a huge blocks even saying my name to everyone. Answering questions were even worse. I tried alot of things like vitamins, psychotherapy etc. And then i found MDMA, i microdosed for about 40 days and now i speak 97% fluent. I therefore stopped microdosing months ago and anxiety is gone- i can even talk to complete strangers and order from drive in. I can live my life to the fullest and my brothers- life is beautiful!