What Is The Cause Of The Cough And Pressure On The Chest?

Hi, I'm 30 years old, 5 foot 8, 138pounds and very active. For the past 6 weeks, I've had a pressure on the right side of my chest when I breathe which causes me to cough all the time when taking deep breath or walking to work. I sometimes have chills at night and short of breath when walking for a while.I was prescribed anti-biotics because my doctor believed it was pneumonia due to chest pain, bloody taste when coughing a lot and chills. I was sent for X-rays but they later came back normal. After finishing the anti-biotics, I was still coughing and was sent for another x-ray to see if there was something but it too came back normal. I'm still feel a pressure when breathing deeply and I cough of lot because of it, have chills at night on occasion, feel a little dizzy at times. None of the medications helped. I was prescribed Tussionex, Montelukast, and Advair. Nothing is working. I did an PFT and Asthma test over a year ago but everything came back normal. My doctor is puzzled ordered some blood work including CBC, sugar and cholesterol but everythign came back slightly better than normal. Therefore, I was referred me to Respirology but my appointment is not before 3 months. I don't think that I'm crazy. I'm writing here to see if anyone had any idea of what this could be?