well I downloaded a new period app yesterday and it says I'm 5 days late and my old period app says…

well I downloaded a new period app yesterday and it says I'm 5 days late and my old period app says I have 4 days till I start my period and I put in all the same information even all the old information that is in my old period app in my new app but I don't know which one to believe. I've been having pregnancy symptoms, my boobs are sore, I've been getting cramps, I've been having mood swings, and I've also been staying very tired. I've took 2 pregnancy test and they were both negative. I'm so frustrated I wish I knew if I am pregnant or if it's just my period.