So I’m a little confused

Kelsey • 💍• Daughter in heaven• Photographer•Crafter

I am in the process of trying to find a Dr and make my first apt. I found out I was pregnant a few days ago.

All the apps tell me today I’m 6w1d but my sister who’s been pregnant a few times (2 miscarriages) said I should only be like 3w.

I got a negative pregnancy test 4 days before my positive.

So what am I?? This is my first time so this is app very confusing to me