Please help

I need help. Me and my husband are trying to have a baby it's gonna be our 3rd month trying and I'm not sure if it's normal but I'm still not pregnant? Does anyone have any tricks or advice? Like when exaclty to have sex how many days after your period should you TTC??? my cycle is 28. Should we have sex everyday for like a week and a half to be sure we don't miss my ovulation? Or every second day???? What's better for the male sperm????