I’m so confused... how far along am I?

Keighley

I know I can’t actually know for sure until I get an ultrasound.. but I have used due date calculators online and my <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> app (flow) that I have logged my 3 previous periods with.. and on here. They all say something different. Someone help me out to get a good idea of how far I might be along?

My last period started December 19th.

My cycle is normally 34 days long.

This is the first response calculator thing online. Says I am 6 weeks 4 days and due sep. 30th.

This is a different online calculation.. says 5 weeks 6 days due October 5th...

This is flow that I tracked my period on for 3 months and says I’m 7 weeks 5 days... also says due sept. 30th??? That doesn’t even make sense. How can I be almost 8 weeks and due sept. 30th. Nothing adds up. Lol.

And this is here... says I’m 5 weeks 5 days and also due on sept 30th.... that’s where I’m so confused. How can I be different on all of them but some still say sept 30th. Lol I don’t understand.. 😂 three of these are telling me the same due date but different weeks along. Wth. 🤣