What Is The White Discharge Coming Out Of Vagina With Itching?

I'm 20, it was the last day of my period and i had sex for the second time since i lost my virginity, then i had notice a continuous white discharge is coming out from my vigina. Every time white discharge is coming out sometimes it feels itchy. I was worried about it. is it possible that i could get pregnant? please help me what sould i do? hope you read my question. thankyou