Is It Safe To Have Intercourse Before The Week Of Menstruation?

Is it safe to have sex on the 24th day of my cycle?We had sex this March 29 he used condom but not right away.My last period was March 6, normally I m having my period during 26-28th day but last February suddenly I did not get my period.Then I just had my period this March 6. So is it safe on my 24th day of cycle? coz we had sex recently.