I agree that you should take things slow. It is great to work hard and not want to "waste" unnecessary time, but you need to accomplish what you set out to do in therapy. And if you go too fast, you may get overwhelmed and at that point there could be a chance that things get unsafe. If that happens, things may take even longer than if you had decided to take your time in the first place.

Being afraid of what is to come is all the more reason to take it slow. It can be useful to take a small step, and then just sit with it for a bit to see how it feels before moving on to the next thing. If you go too fast you won't be paying attention and you may not notice as easily when things are starting to go wrong.