I was diagnosed with sinusitis on Tuesday night, given antibiotics, but I am not feeling any better. I went back to the doctor and he prescribed a new antibiotic. I am still feeling achy all over, very sleepy, difficulty breathing at times (using an inhaler), coughing, congested and head aches. A chest xray was done but showed no pneumonia, it was recommended that I go to the er for blood work and further testing. What else could cause all of these symptoms?