1. 1 teaspoon ACV (apple cider vinegar) & 1/4 teaspoon (or less) of baking soda have done wonders for me. It thins out the mucous.
2. I have also made my own Colloidal Silver (Silver Puppy) and spray it into my nostrils several times a day or as needed, depending on how my sinuses are.
3. Have not experimented much with urine, however, I will be going back to it and have NO DOUBT that it helps in many ways on many levels, so don't fear. You can also start with a few drops in water and irrigate your sinuses that way.
This ALL took a lot of reading (about two years, at least) before any attempts were made with anything. I regret waiting, on the other hand, I was KEENLY listening to my inner voice and I suggest you do the same. Fear is a GOOD thing because it helps us slow down but keep reading, thinking and reflecting. All your answers are within, just focus on listening and go with the *lead* and start slow. Hope this helps.