Should I take another test??

Katie
So on jan. 4th I took a clear blue pregnancy test with week estimator. It came back positive and said that I was over 3wks pregnant. Should I take another test?? I have all the symptoms of pregnancy and now a positive test but I'm scared to take another one. Has anyone else used this test and it not be right or has it been right and you didn't take another one?? Really stuck on what to do.