So I just took a cheapie HPT. I KID YOU NOT..I got a very very faint positive and then all of a…

So I just took a cheapie HPT. I KID YOU NOT..I got a very very faint positive and then all of a sudden it was gone! LOL!!! It was there for like a minute, then boom, nothing! Has this ever happened to anyone else?? I even showed it to my husband just to make sure I didn't have line eyes and he saw it!