I feel like im going insane!

I do my very best to not get sick but others around me especially at my husbands work get our family sick about 90% of the time. We've tested positive for covid and doing some research ive realized we have the "razor blade throat" and ive tried everything. Im in so much pain and nothing is working. Ive tried ibuprofen, Dayquil & Nightquil, cold and flu medicine, tea, honey, cool beverages, cough drops, throat numbing spray, humidity, resting, not talking. I dont know what to do. The only things that helped is sleep only because I cant as much when im sleeping and surprisingly enough a green smoothie. The green smoothie felt SO good. Like I was never sick. Till I finished it then I was dying again. Any advice?