Die Off Symptoms: Need Help

Over the last 2 - 3 weeks, I have been taking 4 - 6 drops of Oregano Oil per day, interspersing with Nystatin (occasionally). I have suddenly lost my appetite, feel like I have a bad case of the flu, my eyes feel heavy / tired. I occasionally have chills, constipation and a very dull perceptive space. My stomach is upset, I belch a lot after eating (and even drinking). My sinuses are draining constantly, making for an intense post-nasal drainage issue. Overall, I just feel really crappy.

I want to know if it is possible that this is die-off, and what is the best way to handle. I am losing weight because I have no appetite to speak of. And, by the way, I was still eating carbs while taking the Oil of Oregano.

You consideration and feedback would be appreciated. At the time this started, I was involved in a major kitchen renovation. It was impossible to eat out of the kitchen, so I ate more junk than normal.

All feedback is welcomed.

Kind Regards,
Carolyn