self-conscious

US /ˌselfˈkɑːn.ʃəs/
UK /ˌselfˈkɑːn.ʃəs/
"self-conscious" picture
1.

feeling undue awareness of oneself, one's appearance, or one's actions

:
She felt self-conscious about her new haircut.
He was too self-conscious to speak in front of the crowd.