I didn't had my period!!

o.z
Hi lady's I was suppose to get my period today like the app said but I didn't!!!! My boyfriend and are trying hard to get pregnant but is been testing a lot and they all negative.. 😢 now I'm so afraid to test cuz I cry wentever is negative..  So do you guys think the app got my period wrong this time ??  Last month got it right I had my period the   Day it said I was suppose to get it. What you guys think is it that I could be pregnant or maybe is just a deleted?? Here is a pic.