I am/was in a similar situation. A few tips to get through your day:

* Identify one key item you want to accomplish. Once you finish it you are off the hook for the day. Limit it to one item per day only. * Have a hard-stop per day e.g. No work after 6pm. * Have a recharge routine. Everyday I pick from meditation, a walk or workout. * Plan something fun after work like a movie, show etc. Mindlessly binging on the internet as I attempted to forget about my day left me more exhausted and defeated. In covid-times, it is hard to plan a meaningful fun activity but a little intentionality goes along way.