I had an MRI done on my back a couple of weeks ago. I've had a really bad backnfor months now. I got a call from gp who said have some minor lower back issues. But found some fluid around my chest. Have to go in for a ultrasound of my chest now. But around the time of the MRI I was just getting over a horrible flu with a hacking cough. Not sure what to make of this. Anyone else had this before ? I've also had an X-ray of my chest a few days ago and they told me they couldn't find any fluid showing. So confused.