Question ?!?!? Advice please

Has anyone ever took a pregnancy test and the 2nd line showed up but it was so faint you can barley see it and it is hard to catch on camera? If so were you actually pregnant? Did the line darken after a few days? I am 2 days late for AF, i completely forgot to test with FMU this morning so i used second and i swear there is an extremely faint line. I have symptoms, but they are also the same symptoms as AF, except when i squeeze my boobs some clear/white discharge comes out. I will test in a few days, im just curious if anyone else has experienced an extremely faint line??? Advice? Thanks in advance