Hi,today I M Planning To Have Sex With My Husband.but

hi,today i m planning to have sex with my husband.but i m afraid of pregnancy.i dont know whether i am n safe perod or not.my last peroids date is 11 th oct,and my menturation duration is 25 or 26 days.so give me a suggestion,whether shall we have tonight or not.and if i eat pappaya before and after intercourse means i will not get pregnant?