Feeling extreme fatigue and tired.

I had sore throat some days ago and I went to doctor (ent), he told it is acute tonsillitis and referred me antibiotics and 'trypsin bromelin and rutoside', I didn't got relief so I again went to another (ent) he told it is acute pharyngitis and changed my antibiotics and increased the dose to 625 mg. Even after that I did not got relief, I was completely fatigued and lacked appetite with a feeling of chill and fever every time. Then I went to Medicine doctor , he did some blood test (CBC, Thyroid, Hameoglobin typing)and throat culture test , everything came normal, he told me to gargle with Betadine... even after that I didn't got relief and day by day becoming more fatigued and chill like fever . ..it's been like 1 month now, again yesterday I went to an ENT , she told it's nothing just my state of mind and anxiety and depression along with acid reflux , so she prescribed me some anti-gas capsule. I am worried , does anxiety cause these symptoms??