Should I?

I had a orhestra performance at spring about 7.30pm. Seriously,i didnt did it with my best. Then i rushed to choir practice. when i walked to back stage,i saw IMH academy higher learning student and teacher,the 1st thing came to my mind when saw them was scared...because i dont know that can i help or join CMC orhestra because i still learning piano and cello at orhestra.

At that time i dont know should i go up stage and perform with them. Seriously i quite scare,and that few higher learning students and teacher knew me. Well, it already happened.. Tomorrow night still got one more performace at cold storage. Haiz...mayb after this,i think i should quit. Coz dont feel good to both side,neither IMH nor CMC...