Fear of losing is one of the major reasons for people losing.
We all may have been causality to this in past.
Rather than fearing, stay in the game and moving consistently towards your goal even at slowest speed is guaranteed to give you best results. Just be honest with your efforts.
Next time before fear takes charge of you, give yourself some time. Slow down if needed. Just see what happens if you don’t quit.
Miracles await for you on the other side when you don’t quit. Keep pushing.