I´ve recently bought eight pregnancy tests...of course trying to concieve might make more anxious. But lets be honest taking the test 2 weeks before you should is way too much. I know you must wait but it is easier aid than done. :)
Anyway I should say I´ve learnt a lot. They are not all the same and most importantly check for the sensibility (the amount of hormone detected) this will help you if you want quick results!