11 Weeks After Endoscopic Browlift, Why Do Close Friends Who Don't Know I've Had the Procedure Ask if I'm Sad?

If the inside part of your eyebrows [towards the nose] is higher than the outside part of your eyebrows, this could produce a "sad look". So if your medial brow was raised too much in comparison to the tail of your brow, this could be the reason for the sad look.

Alternatively if the corners of your eyelids are brought downward, this could achieve a sad look as well. Did you also have eyelid surgery? This could be a contributing factor too.

The only thing I can think of is if the medial (inner) half of the brow was lifted higher than the outer half. If the brow tilts downward it might give you a sad appearance????

In general, the goal with a brow lift is to reduce a "sad" or "tired" appearance. You are still healing, but 11 weeks is enough time to get an idea of how the final result will look.  One of the most important things that should be present when having plastic surgery is good communication with your surgeon.  It is essential for achieving the best possible result and leaving you as happy as possible. I would recommend speaking with your surgeon and expressing your concerns.  If a revision or touch up is necessary and you are not satisfied with what your surgeon has to say, you may also want to seek a second opinion.  Thank you, and good luck.