Cease wasting energy by imagining what others think of how your body looks. Just stop it. That's not what you should be concerned with.
They don't see you inside but inside you are shaking and nervous.
This inner feeling is invisible to other people, they cant see it unless it gets out of control then it fully pervades your body as a tight feeling. This awareness is like really fuzzy heated up inner energy, a bit like a fire raging out of control through your body.
This is a bit random, but makes me smile:
Using an analogy, other people see you as a kettle, (your body).
You experience the boiling hot water (anxious feeling) inside the kettle, like it's running through your veins. They only see the kettle which always looks pretty much the same to others. So no need to be concerned. Some kettles start shaking when they boil, steaming and making noise only because they are given energy to make the still water boil. Much of that energy to make the water boil comes from being overconcerned with what others think.
: - )
James