Yes you can find out at 3 weeks.
As you know, Its mainly based on how long it takes for the hormones level to reach a high enough level to be tested positive. The first doc appoinment is also an estimate , its not untill the first ultrasound they have a more accurate estimate of age. It was kinda frustrating to me ...had to wait, what seemed like forever to find out how far I *actually* was - and it changed a few times by 2 weeks.
Mmm, thats bout it
Yes you can definitely find out that early, for most people it just doesn't show up until 5 weeks. Also, if your last "period" was short and spotty it actually could've been implantation bleeding and since it was around the time of your period, you could've been mistaken! If you are unsure, they will definitely tell you at your first appointment.
Alright :) thank you so much ladies!♡