Help and advice needed please

Nicola • Wife & Mummy of one❤️ MC twice, my two angels 👼🏼 Rainbow baby due August 21st 2019🌈

I am confusing myself never mind anyone else but here goes....

I took 2 pregnancy tests, one yesterday and one today. Both BFP. I’m a little anxious due to MC twice in the past 12 months.

I’m a little confused about my actual missed period date as My last cycle was 14th November and I’m 28days usually. So I calculated today as my missed P but the app says Saturday I’d be due on. Am I wrong or is the app?

Thanks in advance!