Pudding123, I feel very sorry for you. I have chronic sinusitis (I've had a couple of operations on my sinuses) and another, more serious, underlying condition and last year realised that my sense of smell was severely diminished, although antibiotics for the sinus problems seemed to help. Then I picked up another infection and completely lost my sense of smell for months. I understand how devastating it is, especially as I also bake and savour my food. I was poorly all over Christmas, struggling to provide a family holiday but found myself in tears because I couldn't smell or taste the Christmas food I was cooking.
I nagged my ENT specialist again (they decided to try a new approach) and my immunologist increased my dose of regular medication because I was so unwell and suddenly my health improved and my sense of smell returned. It was, in my case, dramatic. However, I am aware that another infection could take it away again.
I'm not sure if any of this helps. I found that most of the doctors I spoke to weren't really concerned about the loss of sense of smell. However, when I reported back to say that I had regained it, the doctors treating me seemed really delighted for me. I hope they are encouraged to help others.
I hope you regain your sense of smell. When I couldn't smell anything and could only taste the basics (salt, sweet, sour, etc), I found textures important. Pickles and salads, ice cream and chocolate, nuts and crisps (I couldn't get enough Twiglets) and also chillies and curries for spicy taste.
I wish you luck. You have my sympathy.