Help with work

I’m trying to work on letting go of the thoughts “I didn’t get enough done today” and “I’m going to lose my job” because I can see that this thought is keeping me from doing my work. But every day I know that I didn’t get enough work done to meet my monthly goal. It keeps me up every night crying which afterward I wake up late or work slower because I’m so exhausted and don’t get enough work done. I’ve been trying to work on this thought pattern for months now but this belief has me in its clutches. I was told by a coach that even if this thought is true, it’s not useful so I need to let it go. I try to allow it and even anticipate it every day but I still can’t accept that I’m not getting enough work done.

Please help, I can’t seem to break this cycle