I have unprotected sex with my Bf after my period , my period end end on the 20th Oct and i have sex with him on the 22th oct. He did not ejaculation inside me, he using the pull out method and shoot on my tummy, every time he shoot he only clean it with tissue , and half an hour later we have sex again, this go on for 3 times . Will i get pregnant due to no washing of previous sperm ejaculation ?