I Have Been Tested For Stds, A Panel For Cancer-hiv,

I have been tested for Stds, a panel for cancer-hiv, etc. All came back negative. I have acid reflux, allergies and asthma. I had a GI two years ago and was told I had esophageal thrush. After using a Mycelex (lozenger) it went away. Months later I had it again, and again, counting at 5 times in a year. I'm on a thrush medication (Diflucan) right now, but it isn't working this time. My symptoms are- hard to swallow, restricted airway making it difficult to breathe, swollen lymph nodes, swollen neck, sore neck, head aches and fatigue. I wasn't using and asthma inhalers during the first three or four times when I told the Dr my symptoms were back. We both assumed thrush came back again. Can you help me??