I had a similar injury with some bleeding on the brain (brain
contusion) a year
and half ago exactly today. I lost my real sense of smell
and taste (think it is called Parosmia). If you have complete loss of smell and taste it is anosmia.
This alone can lead to depression. No one knows you can get it back or not. Doctors gave a random number 3 months, 6 months, 1 year etc., So it is still earlier to decide in your case.
Also depression, anxiety etc., can happen with head injuries.