Sir, very sorry for your loss. You need to understand that your loss is recent and it will take sometime to overcome grief- but, do consult a counsellor or psychologist who can help you in the process.
Health Tips
do not try to push away the emotions or memories.. they will always be there. instead, you can take moment to try and accept their presence in your mind and get on with the work at hand. there is no need to push yourself too much to get back to normalcy urgently.. grief takes time and it's very natural to go through this process for everyone of us at a point in our lives. take your time. good luck.