Hi keefa, yes, it is normal for you to struggle today. Your W filed for divorce, she is moving out, she is taking your sons. Your feelings of loneliness and sadness are normal. Embrace the sadness today, and try and get back on track tomorrow.
B/c you don't want her to move out, do nothing to help her move her things. Get yourself out, and occupy yourself doing other things. You are not being a "jerk" by not helping her.