Hello. My Wifes Last Peroid Date Was 8 September Nd

Hello. My wifes last peroid date was 8 September nd till nw no period, i had sex with her on 16 sep, i never ejaculated inside her... She is not a regular before also. I bought pregnancy test kits nd it showed negative on 23 oct and it showed negative. Do u think she might be pregnant if so can we end the pregnancy by using the unwanted kit?? I gaved her the unwanted kit. Bt still there is no bleeding. First pill, that is mifepristone i gaved her yesterday 4.00 pm and today 4:00 pm i gaved her misoprostol ?? And according to the physician i hv to give her the remaining 2 pills.