How Can Cough Along With Shortness Of Breath Be Treated?

I ve been having problems with coughing for the past 3 months. I have asthma and COPD but it s always been under control with my meds and inhalers, I ve had a great deal of stress recently in my life, I went to my bariatric dr s 2 weeks ago they checked my vitals as they always do and asked if I felt ok I said ye just a bit tired they said my oxygen was low (82) they brought me Oxygen before I left they checked the level again it was at 98 and I felt better. I had an appt. with my pcp right after that appt. I had many things to discuss with her, like my ear was bothering me, my feet has burning-tingling I have diabetes also the coughing and of course my oxygen level being that I just found out about it 1/2 hr prior. she found fluid in left ear, She put my on zythrimicin, zyrtec, samples 50 mg of lyrica and she check my oxygen level it was at 80 so it dropped in about 1/2 hr between dr s offices. Of course I take other meds everyday but I ve had no energy at all I just want to sleep I m still short of breath my mouth, nose eyes are so dried out. I feel worse not sure where to turn next.