erm means it could have been 2 weeks on your first test, then today it’s 3 weeks? suggest you don’t test too much already.. make appt to do blood test to confirm if you wish, or see a gynae at week 6.
Your pregnacy is about 4 to 5 weeks old and that you conceived bout 2 to 3 weeks ago. You better have it check with doctor, then count on from your LMP to roughly gauge your pregnancy weeks.