have an insane flu or virus or something. I started

HI, I am desperate and frustrated. My son is 5 yrs old and just started school on September of this year. He got the flu shot beginning of October. Week or 2 later, he started with cold? as the Dr said then, virus and as you know nothing was prescribed. After 7 days with fever, Dr decided to see him again and he decided to give him antibiotic just in case. 4-5 days after the meds, he started fevers again for another 7 days? see the Dr and I asked to look deeper in to it as I knew something else was going on. That night we ended up at the hospital where they told us he had all the symptoms of pneumonia. Only 2 weeks ago, and now again, runny nose, coughing and fever. I am worry and very desperate. We owe many visits to pediatrician and to the hospital and not able to work. Please help me to understand if this is normal or any test to be run? I am looking for new doctors by the way. Please help me :) Thank you so much.

Hi. It seems that I have slight flu symptoms coming on rather quickly. Diarrhea for a day. Slight aches in arms. Tired. Anxious. My husband feels like he has a cold that started yesterday. I m concerned because I m an anxious person that it could be something serious but I m not sure what it could be. I ve ruled out Hanta Virus. But you can see how my mind works.