Justhadenough is spot on
It is normal to feel as you are. Keep busy. Make some tea and keep logged into SR.
I found doing something practical helped even if it was just chores. I set myself little milestones. Clean the bathroom, then you can sit down with a a cup of tea and chat on SR for example. That way I got a little bit more tired with doing something and rewarded myself. Sounds stupid doesn't it but it got me through the first couple of days until I felt a little more human.