Clearblue week estimator?

Have you used a clearblue week estimator digital test? When did you finally got a 3+? How many weeks were you? Thank you very much in advance for responding.  I am first time pregnant :) and just wondering when should I take the test to get a 3+.  I took one at 4 weeks and I got a 2-3.  I am currently 5 weeks. Please let me know your previous experiences.