Can anyone or somebody please answer this

Had sex for the very first time on the 12th basically in and out . no condom cherry popped blood came out . now im freaking out . no semen was involved just scared about my period not coming .. Help asap . Is there any where possiblei could be prego ????  period is suppose to come in 5 days ( a week basisally ) im stressing because I'm having a big surgery soon need answers pleas