Anosmia / Loss of Sense of Smell

Hi, I lost my sense of smell about three years ago after a bad virus or flu. I tried high dose vitamin C, zinc, magnesium, coffee enema, colon cleansing but I didn't see any improvements. Since last Sept, I have been seeing a smell specialist and did tests about vitamin and mineral deficiency. These tests came back normal. The smell specialist said my olfactory receptors are damaged and he's been giving me the Theophylline nasal spray for 6 months, and I had no improvement. I even felt further deterioration because the food doesn't taste as good as used to be. I'm devastated after trying so many things but nothing seems to work.

Please help!