First, if you had your medical for the visa less than a year ago, you do not need to attach an I-693 medical for AOS only need to attach a vaccination supplement, search "I-693A" on this site.
This is THE most asked question on this site. SEE:
http://www.visajourney.com/forums/index.php?showtopic=103541I-131 is NOT needed for K-3, this is explained in the directions included with the I-131, because K-3 is a multi entry visa.
I-131 directions page 1
QUOTE
NOTE: If you are in the United States and wish to travel abroad, you do not need to apply for advance parole ifboth conditions described below in numbers 1 and 2 are met:
A. You are in one of the following nonimmigrant categories:
3. A K-3, spouse, or K-4, child of a U.S. citizen;
B. A Form I-485, Application to Register Permanent Residence or Adjust Status, was filed on your be halfand is pending with USCIS.
However, upon returning to the United States, you must present your valid H, L, K or V nonimmigrant visa and continue to remain eligible for that status.
http://www.uscis.gov/files/form/I-131instr.pdf