I found out I was pregnant yesterday with baby #2 😍

Anyway, my last period started 30th December, so going by that, means im 3 weeks 4 days (thats what this app says)

but I took a digital test and it’s saying its been 2-3 weeks since conception (3 weeks ago today I was still on my period) and the clearblue instructions say that 2-3weeks on the test means 4-5 weeks pregnant.

HOW? I dont undertand theres a big difference between 3 weeks that the app is saying and 4-5 weeks?