false positives are rare false negitive are way more commone, with your f/positives you were probably pregnant, but your period came on a couple of days late, this is called a chemical pregnancy and the problem with early pregnancy tests or testing before your period is due is that often it comes up positive then as I said you get your period anyway, years ago when you got pregnant you missed your period then went to the doctor, if youru were pregnant and didnt know it then got your period a couple of days late, you would have thought you'd just had abit of a long cycle that month
I have had false positives and don't want this to be another
nope, any second line faint or not is a positive :)