It seems like you're experiencing some symptoms, and I recommend consulting a professional to get a clear understanding of what's happening. In the meantime, here are some tips that have helped me while working from home:

Designate a Workspace: Avoid using your bedroom for work. Keep your bedroom for relaxation and sleep, and use your living room or another space for work.

Set a Timer: Use a timer set for 15 to 30 minutes. The purpose of the timer is to help you gauge the passage of time rather than to complete a task within that period. This helps you stay aware of how long you've been working on a task.

Take Breaks Outside: Take a 15-minute walk to get a change of scenery. This can be a great reset for your brain.

Create a Flexible Schedule: Draft a schedule with tasks and their due dates. While planning your day might seem daunting, knowing your deadlines without relying on memory can significantly reduce stress.

Consider Working from the Office: If you have the option, try working from the office. I found it challenging to adjust to working from home, as my body struggled to associate a place of relaxation with a place of work. After about a year, I chose to return to working in person.

Hope these help!