Stuck between ENT docs and dentists

[Margot49]

Who don't work together!
My story is too long to repost.  
Had a root canal 3 days ago and on antibiotics.  Odd, the day after I had very little phlegm issues.  Since yesterday, getting worse again along with dry mouth and throat and feeling like I am choking.  Bad tooth on left upper side. I have told the ENT doc's since this started something is not right behind left sinus area, above soft palate and down my throat. CR scans and MRI don't show anything.  Dentist told me he has no way to x-ray that area.  There must be some specialist or test that can pinpoint that area.
This is horrible to deal with.
Any suggestions?

[Margot49]

Thank you for the response. Saw the endodontist today and he confirmed no infection in the back tooth. Also told me to stop the Clindomycin as I was very nauseated. He said there was no coronation between the teeth and my sinus/ mucus issues. :-(
Also saw an oral surgeon to consult as to whether I am making the right decision regarding bridge work. (another story) he confirmed that a dental issue could be the cause but didn't see anything on the dental x-rays and said a CT scan should show that.  Two ENT doctors have ordered CT scans which showed nothing.  An MRI didn't either.  I've been scoped and had biopsies done, this has been going on for over 3 years, and none of them can find the cause.  Very discouraging.
Thank you again.  If you come up with another idea, please let me know.

[Paderla Anitha, DNB]

Hello and hope you are doing well.

I certainly think seeing an ENT is a good idea.  Infected tooth roots from the upper teeth can go inside the maxillary sinus and cause sinusitis.  The symptoms you are experiencing might be from chronically inflamed sinuses. You might need a repeat CT of the sinuses for more information.  However, if you still have an infected tooth, you will still need to have this addressed as dental infections can be potentially life-threatening.

Hope this helped and do keep us posted.