The key is, you are in control. You don't have to do it all at once. You can go slow enough to where you don't have to feel out of control and start spiralling. With your T's help, identify one tiny step, one small movement toward facing part of your avoidance that you believe that you could handle. Make a decision to face it and do it. You will succeed and probably feel much relief and a little more confident. Then, plan the next step. And so on.