3 days late

So this is only my 3rd month of using the glow app, but I'm 3 days late, last month I was a day late, but I started..I was 4 days late when I found out I was prego for my son, but I really don't have any symptoms, just kinda sore boobs and constipation...how long do y'all think I should wait before testing? Thanks in advance!!