For all you preg. ladies.i need help with my "maybe" BFP...?

Ok so I took a test today...and right off saw a second line but its SO faint...the line showed up as soon as the urine hit it....then after the 3 mins were up it was a tiny bit darker.......but im scared its an evap line cause it SO SO light...did any of you ever get evap line? Whats it look like? Does an evap line show up right off like that or after the alloted time. Also, when I first got these tests delievered(I ordered a 10 pack) I took one right off that day so that i can see how they worked..and that one was neg. and even after sitting for hours, no evap line..so what do you think? Im so scared to get too excitied.