I am a 25 year old female. I am engaged. Currently I am very busy with my career life and I can't afford getting pregnant. My fiancé and I agreed on delaying marriage for the time being. We usually have a very superficial sexual contact during which he puts on a condom. I am still a virgin according to medical examination. I know that hymen can permit sperms entery through tiny pores. My fiancé wouldn't put the condom right from the beginning and lately I had this paranoia that I can get pregnant from the pre-ejaculate because I know it contains sperms. The last time we had sexual contact was the first day after I finished my period... could I be pregnant?