Is it bad that I played on my hurt shoulder?

I hurt my shoulder in volleyball practice last week and had a game yesterday. I played without my coach realizing how bad it hurt and probably hit about 75 times. Now it hurts really bad and I'm going to the doctor Friday. Do you think it's bad that I played on it? Also (you don't have to answer if you don't know) do you have any ideas what might be wrong with it. I hurt it getting my hand stuck while diving and my shoulder pulling back.