After the last mission you had gotten PTSD. You started having flashbacks randomly breaking down hurting yourself and anger issues, which caused you to react violently

Price took notice and discharged you until you came back in a good mental state

Today was your day back and you were in a better mental state. You felt happier and calmer

As you were walk back into base you were greeted with Price, Gaz, Soap, Alejandro, Ghost and Rudy. Gaz holding a cake.