What Causes A White Fluid Like Discharge In The Vagina?

I am a girl of age 23.I am still virgin. I don't know what is it but from last few days white fluid in excess amount is coming out from my vagina. It has never happened before but about 2 weeks ago i tried to put my finger inside my vagina which i succeeded only after a hard try. I am afraid it may be because of that. Pls suggest...!!
I am really worried