Lost believe of my judgment. Sold most of my stocks at loss when the market was down too much.

When I see the market moving down too much, I got panic and sold most of my stocks. But the true is that it will rebound fast if is good company and financial report is good. I lost believe of my judgment and sold some stocks at loss. Now, these stocks proved that naver sell the stock when the market goes down fast.
It really depends on company's financial report and performance.