One of the most insidious aspects of Fear is that it pushes us to do exactly the opposite of what will bring us relief and a perspective for powerful action. In other words, fear pushes us to act out of fear, to act because we are afraid. Fear wants us to blindly accept the terror of an only imagined future. Fear hopes to dupe us into acting against our best interests. Fear goads us into acting from aversion.
Saying we are going from the third to the fourth dimension (or whatever the different ways of talking about it that there are) is to miss deeper understanding. These dimensions exist all at one time and we (Mother Earth & Planet Earth) and you are already in them. So it is not something we are moving into. But what is changing is the predominant awareness of where humans are and how humans are aware that they can exist. Awareness is changing.