I don't know for sure, but I suspect it could be the x-rays. It IS radiation. However necessary it may be, it is still not something the body welcomes.
What I would do to help the body cope through any x-ray (something to keep in mind if the United States gets its' Socialized medicine, where mammograms and x-rays will probably be made mandatory) is to buy some dried Kelp or other seaweeds and eat some every day until you feel better.
This will help the thyroid and other glands deal with the radiation better. I read that some Chernobyl victims were given Kelp to help them from the radiation poisoning received when that nuclear power plant blew.
Some people are more sensitive to xrays than others, but they are bad for everyone none-[the-less.
You're adrenals may have been stressed from those mouth xrays, so do not have any coffee at this time because coffee will strain them even more, and you will have even less energy.
Check this page out for the nutrients that help heal adrenal glands:
They sell vitamins there, but there is a good list that shows what specific nutrients you can take:
( Adrenal glands need all the Vitamin B Complex 50, especially Pantothenic Acid for normal function. Ester-C and Bioflavonoid Concentrate are essential for normal adrenal processes. L-Tyrosine aids the adrenal gland system. CoQ-10 is important for the oxygenation of the adrenal glands. The herbs Astragalus Extract and Eleuthero Extract/Siberian Ginseng aid adrenal function and reduce stress....)
http://www.mitamins.com/mitamins/la...amp;amp;gclid=CPnU6aPx4pACFSosagodZBYjXQThen I found these websites that also have tips on Adrenal restoration. (Feeling wiped out an tired can be a sign of affected Adrenal glands- perhaps caused by the xrays)
http://www.womentowomen.com/adrenal...igue&keywords=the+adrenal+glandshttp://www.enotalone.com/article/4170.html 
