Can Sex On The Next Day Of Period Cause Pregnancy?

hello doctor want to get some solutions during sex with my life partner some drops of sperms has drop into her ovary and we think it has gone inside slightly.It has happend after completion of her period of 1 day and she has period last month twice on 1st of decand 28th dec and still her period has not yet been start,so we think she is pregnant and our marriage has fixed on november of this year so wht we will do