How many damn weeks am I really??

Ari

Okay ladies so I really need help bc I’m completely confused ! Soo long story short I found out I was pregnant wayyyy early. (I think I’m about 2 or 3 weeks). Went to the doctors to have it confirmed and was told “congratulations you are pregnant” 🙌🏽 this is my first pregnancy so I’m super excited. Okay anywho , when I use other apps to track everything it states that I’m 4 weeks pregnant which doesn’t make since to me bc it hasnt even been 4 week since I’ve seen my boyfriend. So I put in both the first day of my last menstrual cycle (Dec 29th) to see and then I did the last day (Jan 1st). I saw my boyfriend from Jan 9-15 and they both come up on 2 different apps that I’m 4 weeks??? (And no I haven’t cheated on my man 🙄). I do have another checkup on Thursday so I can ask my doc then BUT just wanted to know if anyone knew why it may say that or any advice. Thank youuu