Depression Support Group
Depression is a real and debilitating condition that is often misunderstood by family and friends. Its meaning can range from a prolonged period of sadness to an actual mental illness with specific symptoms. Find and share experiences with others who are going through the same struggles.
I don't think you should have kept working when you were sick. You made the right decision to go home; you didn't mess up.
Your boss is possibly busy so don't worry about it. If she is upset then that is her issue not yours.