Disappearing positive

[polkadotpolarbear]

I'm 8dpo and I tested with fmu (internet cheapie) and control line appeared and a couple of mins later 2nd line appeared and then moved after a few secs and seemed to merge with control line. Never seen this before. I guess it's just a dodgy test and this is a negative?

The dye from those internet cheapies seems to 'flow' across them, doesn't it? So I can see how it would briefly look like a second line in that process. I think I wouldn't read much into that: but it's very early to test (too early, really?), so I also wouldn't consider it a definite negative!