A little confused 🤷🏻‍♀️

I need a little input from y’all! So my last period was from January 9th to the 14th and my cycle is an average of 33 days. I am very regular and I have never missed a period except for when I have been pregnant in the past. Well I finally tested positive a few days ago and as of right now the estimate is that I’m about 10 weeks and 4 days. I have an appointment for this Wednesday but of course I’m googling the shit out of this and wondering haha This didn’t happen with my first two pregnancies, I got a positive fairly quickly. I was just wondering if anyone else has experienced this and what may be the cause for me to get a positive so late? With my last period being so long ago and me getting a positive this late, I’m just having a hard time believing that I’m going to be 10 weeks. But I know I’ll find out Wednesday, I’m just being anxious!’