Diagnosed with the flu today 😩

I would have never thought I had the flu. Bc other than not being able to breathe out of my nose- for the most part I feel fine. Been trying to drink as much as I can, taking vitamin C, elderberry syrup and vitamin d3. Absolutely nothing has helped unclog my nose- you name it I tried it (breathing in steam both in the shower and boiling water over the stove, cough drops, neti pot, vicks, and young living peppermint oil). Anyone else have any ideas to try and kick this flu and/or help with breathing?!

Edit: I’ve taken tylenol and robutussin which I’m no longer taking bc it raised my pulse to 144