Kinda scared

Jessica • We make mistakes but that`s how life goes you either learn from them or they destroy you
Hello, I'm currently late 6 days of my period. I sometimes get 3 days late but I feel like it's been to long. I do not use any birth control. I sometimes get cramps, back pain but my boyfriend always uses condom. Should I wait to do a pregnancy test or is probably stress that's causing it?