There a couple of things you can try to help.
Seagate Olive Leaf Nasal Spray
Irrigation by using a Neti pot adding about two or three drops of tea tree oil to the saline is often successful if it’s a fungal infection. You can alternate the tea tree oil with oregano oil, but start with one drop of the oregano and don’t go too high; most of you guys know how strong it is.
Many people have actually used probiotic powders in the saline water as the irrigation substance.
There are guidelines which anyone using sinus irrigation should adhere to.
1.Use uncontaminated water.
2. Irrigate with a gentle steady pressure.
3. Prevent re-infection from devices that allow pull back nasal mucus into the device. (flowback)
4. The correct head position is important to avoid spreading fungi or bacteria to unaffected areas. The head should be bent forward looking straight down.
5. Do not irrigate to excess. The nose itself contains healing properties.
NOTE: Research has shown that approximately 60% of patients using irrigation tools experienced an increase in nasal and sinus infections when they continued use of pots over several months time; the increase was caused by re-infection and removal of natural healing properties such as immunoglobulin.
Of course, healing your Candida infestation is going to be the ultimate cure for a fungal sinus infection.