Loss of smell and taste after head injury

I was run over as a pedestrian, by a Toyota Tacoma 8-9 months ago. 3 brain bleeds, skull fracture, scalp laceration, contusions, concussions, double vision, tinnitus, balance and dizziness, plus the aforementioned lack of taste and smell. I used to bake and cook. I guess I also have SIBO and need a low FODMAP diet and be gluten free. There is terrible insomnia, depression, anxiety- esp crossing the street. I've been doing my own smell therapy with essential oils. No luck. Im pretty suicidal at this point, but I have dogs- so Im safe. Is there any hope?