Evap line

Hi guys! I took a test and it came back with a vvvvvfl and I woke up the next morning and it was more prominent. I think it was an evap line because I got a test at the doctors and took another one at home and they both came back negative but I read that if you put water on the test it washes away the evap line and it did a little but i can still see it! positive or evap??