Also: you are early on in your recovery; there is a good chance you will get substantially better over time.

In the meantime, be sure to discuss the issue of depression with your doctor (and maybe seek a referral to a neuropsychiatrist skilled in helping people with TBIs). And take good care of yourself: get adequate sleep/rest, good nutrition and supplements, minimize stress, avoid overexertion/overstimulation, etc. There is lots of good support and info on this site.