The panicking is a normal response to your situation. That said, DB'ing is not normal. It is counter intuitive to everything your mind and heart will tell you. The truth being that it works....it works very well. Read the entire story of TG, Ericsmart, etc....The have started the path to refinding themselves and that is just one step in many you will go through.
Forget about time lines, the affair, the OW, and the impact it will has on all. Those are things you have no control over. Worry about only the things you control.