Help plz

Last month my period was 2 weeks late. It was supposed to start i think on the 9th ish but it was 2 weeks late and it was a heavy period. According to glow my period is supposed to start here in i think 3 days. If i dont get it and it goes past the 23rd with no period still, should i take a test? Im really confused right now. Also last month i had nausea for about a week and for the past 3 to 4 days, i hope i dont get my period.