Hi everyone! I haven't had my period since April 15th, and I have been sexually active. I took a pregnancy test last night and I waited 2 minutes because that's what it said in the instructions, it didn't show up anything so I just went to bed. I woke up this morning and thought I better check it so I did and it had a faint positive line. I took one this morning after seeing that and it is completely blank. Any ideas why?