Fear is part of the instinct of self-preservation. As you know, reasonable fears prolong the life of nerve cells. And fear without reason, on the contrary, makes your life makes unbearable. Perhaps the most famous fear is "Fear of losing control." It is the most common when investing.
You can not influence the situation, you can not explain the price volatility in the market. This is normal. You are afraid that you are an ordinary person with normal mentality and instincts.