Irregular period


So I have an irregular period. My hubby and I have been Ttc for over eight months. My cycle runs anywhere from 33 days to 42. I’ve been trying to track symptoms and started doing ovulation tests. I tested for two weeks (from when the app said my ovulation should start until now) and they all came back negative... until today (day 30 of my cycle). The app predicts I should be getting my period in five days? Is it possible to get pregnant during such a short time period? Or is it my cycle even further off than usual? Or could the test be a false positive? Help? Anyone else in the same boat?? So anxious!