I Have Not Felt Well Since The Beginning Of August

I have not felt well since the beginning of August & it is now the middle of November. I have been to the ER 4 times, urgent care 2 times & 2 different doctors . I have back pain, chest pain, & it is hard to take a ddep breath a lot of times. I cough up phlegum sometimes tinged with blood. I am tired all the time & am not always able to go to work or play with my 3 year old son. Sometimes the pain is more severe than at other times. I have had a CT scan of my heart & lungs & was told that they are ok. I have had many blood tests that always turn out ok. A few times my white blood count has been elevated but they tell me it's not that bad.I have been tested for Lymes disease & TB which turned out ok. I just saw a pulmonary doctor who examined my lungs withsome breathing tests & did a scan of my sinuses saying they appeared infected & then dismissed me back to my primary doctor, not saying if I needed anything for that sinus infection. I'm sure I am not remembering every detail but you can get the general picture. I am sick, sometimes very sick & no one is helping me. I even went to Mayo ClinicER but they couldn't keep me to do more testing because I wasn't sick enough. Any ideas would be helpful. I now have to make another appt. with my primary doc. Please help me!!!! My primary doc has filled out papers for my job advising I be put on short term disability until the end of the year.