Late period

So today makes day 3 going on 4 of not getting my period. My boyfriend and I are very careful, we use condoms and he still pulls out even with the condom on. I’m not usually this late. And I’m starting to get nervous. I suffer from really bad depression and this month truly hit me hard. I’m not sure if its my emotions throwing my period off cycle or what. What do you girls think I should do? Should I stop worrying and just give it a few more days, or be getting ready to take a test.