PLEASE I NEED HELP

PLEASE I NEED HELP Hi, I have a speech block. When I was really young, it was only minor but all of a sudden it got really worse and now I can barely speak one sentence without being blocked. I'm not really sure why it got worse all of a sudden but could this be because I'm more aware of my speech block because before, I didn't really know what was going on with me and now I feel even more insecure and have terrible anxiety? Because of my speech block, I can't even be confident in class and every time a teacher calls on me, I just start to have panic attacks and can't calm down. I know that being more confident and slowing down is supposed to help but nothing works for me and I can't go to a speech therapist either. Any tips please :(?