shall i take a test???

ok ladies.. so i need some help really bad... since my teens when i started having periods, im never late.. aunt flow always showed on time.. now im exactly 6 months pp with my second baby.. last month i had my periods on time.. we even made love but we did used condom and never were lenient.. but my periods dint show up this month.. today im 6 days due.. m scared as hell.. dint took any pregnancy tests... any thoughts, what can this possibly mean?? WE NEVER HAD UNPROTECTED SEX