tips on how to disguise you've been crying?Watch
making excuses to wash face
saying there was something in the eye
are there more?
Just get away from people and smile aggressively(make every part of face, including your eyes, smile), even if you don't feel like it. Apparently it makes you feel better if if you feel like sh*t., which in turn makes you look better, or at least as if you weren't crying because you were sad. It's worked for me in the past.
thanks that would also help