Whether or not you can detect early pregnancy at 30 days depends on the different menstrual cycles of each woman. If the menstrual cycle is normal, in 28 days a menstrual period, then in 30 days of early pregnancy test paper test may detect early pregnancy, this time the test paper suggests a weak positive (+-), that is, two bars, one is more obvious, the other bar is hidden. If you are not able to detect early pregnancy clearly, and you really want to know whether it is early pregnancy, you can give blood HCG measurement at this time to further clarify.