Help me I'm paranoid!!!

Okay so yesterday my boyfriend and I both lost our virginity to each other and of course he wore a condom but some of the cum traveled up the condom and I don't know of any got on or in me. Should I be worried about getting pregnant and go ahead and get the morning after pill or am I over exaggerating about it. 
Ps my parents don't know we had sex and I want to buy the plan b pill but I don't have the money to get it so if anybody has an idea on how to get it inexpensively that'd be a great help