Late or not? Period apps which one to believe

So my husband and I had a miscarriage last August at 12wks. We waited 3 cycles to start trying again. Well according to glow I am late by 2 days, but my flo app says my period is supposed to come today. So far nothing. I log everything the same on both apps. I had sex 3 times during my fertile week. I already planned on testing by monday if AF doesnt show up by then. Also my period was 4 days early last month (does that make your cycle late the next month?). I'm trying not to psych myself out but I am nervous and scared. I want this so bad I'm afraid it's going to be a chemical pregnancy or I miscarry again if I do get a BFP. I'm posting because I'm making myself go crazy. Just need someone to talk to besides my husband because he's no help right now lol.