Here's my prescription: stop worrying about your pedigree! Your accomplishments will always speak louder than your alma mater. Nevertheless, I'll throw in a comforting word or two . . .
How about this quote from the president of St. Olaf, in April 2010:
For many years, St. Olaf has had a strong collaborative relationship with Mayo Clinic in Rochester, with science and economics majors regularly conducting hands on investigation and research with Mayo physicians and researchers under the auspices of the Mayo Innovation Scholars Program. With the new oncology center, we anticipate expanded opportunities for internship placements and student-faculty cooperative projects here in Northfield.
Or this: US News ranked Tufts (one of the schools you mentioned) #41 in Primary Care and #51 in Research. Between 2004-2009, St. Olaf Grads have gotten into the following med schools which are more highly ranked on BOTH counts: Baylor, Boston, Colorado, Duke, Emory, Iowa, Johns Hopkins, Mayo, Medical College of Wisconsin, Michigan, Minnesota, Northwestern, Ohio State, Oregon, Pittsburgh, Wake Forest, Washington, WUSTL, and Wisconsin.
They got in to the following schools that are ranked higher in research: Boston, Case Western, Chicago, Cincinnati, Columbia, Cornell, Dartmouth, Georgetown, Keck (USC), Mount Sinai, New York University, Stanford, Vanderbilt, and Virginia.
They got into the following schools that are ranked higher in primary care: Kansas, Michigan State, Missouri, Morehouse, Utah, and Vermont.
6 of the top 10 research schools are represented, as are 5 of the top 10 primary care.
I hope you feel better soon!