Hi Joannie, I tried e-mailing you but got no answer. Does your insurance offer the option of a nurse line to for her to Q/A you and provide more exact advice? If not, you could try calling a local ER to see if they could give you some basic feedback so you could decide whether to be seen in person.
This is an old 1997 Mayo article, but basically the answer as to which procedure is best is that "it depends". Echoes are more available.
http://www.mayoclinicproceedings.com...p?AID=3369&UID=
AlaskaAngel