My boyfriend and i engaged in nude genital rubbing. He performed oral on me and i then i performed oral on him.He did not penetrate and he did not ejaculate before rubbing or afterwards, nor did he ejaculate during the oral.He also did not ejaculate any that day prior to us fooling around. My only concern is precum but does oral lessen the viablity of precum making me pregnant.. this occured on the 25 day of 31 day cycle.. took plan b within 120 hrs of risk but two days before my expected period which is today? did i miss my period bc of plan b or what? give me your opinions on my situation

took the pills 96-120 hours after risk
what is the probabilty of my pregnancy risk i really need opinions the risk occured on the 13th of march i took a pregnancy test today an was negative however i know it might have been too early