TTC, DPO 12

My OV was Sept 9th. I'm TTC. 12 DPO & Premom app says 1day period late.... I have 6 apps on my phone lol simply to see "what's more likely to be correct," OV & period dates,... I really like the Premom app but it doesn't give a lot of reading material for info ... Which for that reason is my 2nd fav app, The Flo app.... All the apps say my period should start Sept 22-24.... Except one app, which says week of October 6th (CLUE app)... Though I normally get my period about 5-10 days before the 30th(end of month) or 1-4 days after the 30th. Pretty much the end of month... So for me if I haven't gotten period by Oct first I'm going to preg test🤞🏾. I have 2 girls, 4&5, (10 mths apart) I planned them that way... And now wanting a Boy..