If you've had two clean flushes, you probably need to look elsewhere for the source of your allergies. First of all try foods, dairy, eggs and wheat are the most common allergy foods. Try to eliminate all of them for several weeks. Then reintroduce them one food at a time and see if you have a strong reaction. As already suggested try doing a bowel and parasite cleanse too. These will help flush out toxins that may be responsible.
My allergies have almost disappeared after a year of flushing, yet I get a ruuny nose for a day or two after a flush.