Please note that when one is feeling shaky and mood-swingy from the combination of stress of trying to conceive, lack of bodily cooperation, and coming off anti-depressants, one might question the wisdom in deciding now is the best time to read up on the various types of cerclages performed.
One might further note that while pursuing medical information rather than, say, Yahoo! Q&A on the subject is generally a good idea, reading about the formal diagnoses and procedures and risks of cerclages is maybe not a good idea.
Further, if one were to disregard all the above and stupidly read up on it anyway, then one probably deserves what one gets, even if that is a nauseated sick feeling and the shakes when contemplating the procedure.
You have only yourself to blame. Now is an excellent time to pull the list of questions for Dr. B back out and start adding to it.