I had the weirdest experience at the endodontist this morning and am
wondering if someone would comment/confirm what I suspect.  
Background: my only pre-existing medical condition is hypothyroidism
for which I take Synthroid daily.  The doc injected me once amd I did
not become numb; so then she began another injection. It seemed she
stuck the needle in really far to me, but Im no dentist, so any way,
immediately I had extremely blurred vision, dizzyness,nausea, and
tremors to that side of the body.  I stopped the doc, and told her
what I was experiencing, and she stated it would stop in a few
minutes, which it did except for a throbbing sensation in the sinus
area. Later I would have  aching on the side of my head down to my
shoulder. At the time the doc seemed to insinuate that I was either
A:hysterical, B: making up the symptoms, C:did something to cause the
symptoms, D:all of the above plus I must not have eaten that morning.  
I have had extensive dental work in the past with numerous injections
and never had any thing like this happen. The closest I can think of
is when I had an epidural infiltrate, and I had vison changes. I am a
nurse, so I understand a few things, and think she may have injected
into my bloodstream. If so, are there any long term effects from
something like that?? By the by, I never did become numb in the least!!