What do you think ?

Ok took a test yesterday I'm not even due til 2/12 but I can never wait been trying for about a year with one miscarriage a couple months ago . Anyways waited the 3 mins and was bfn I have older children and didn't want them to see the test so stuck the box in my draw and went to throw out this am . Checked test again and a faint 2 second line is there !! What do you guys think anything like that happened before ?? I'm trying not to get my hopes up :)