A doctor friend advised the following: lose weight until people think you look too skinny, then go 10 more pounds. The main problem is that westerners are so used to seeing overweight people, that even at "normal" sizes, people look too thin. I've worked in Africa with very healthy locals. Extremely muscular, tall guys that weighed probably145. They did not look too thin at all. They all looked normal.
So, start ignoring your friends and family. Trust your brain and your doctor. You did all of the research, so you know what is best.
Good luck!
Jason