Disappearing positive - am I going mad?

[GingerDoodle]

X posted for traffic.. Sorry I know it's not exactly the right place!

Ok, no idea what cycle day I'm on - had my coil out last month (22nd) and no bleeding. I've got a pack of cheap internet tests I'm doing randomly.

Today I've had two that have showed a red line but under where the plastic bit is (so obv not the right bit) so I flicked it up for a better look decided it wasn't positive then looked back to see a red line in the right space!

Second one was convincing enough to show Dh but it then disappeared - what the heck? Didn't get this with dd - were either def neg and then def positive with a line never faded.

I had that's with my first hpt the line went across the was instead of vertical and then turned vertical after a minute sometimes I think we look at tests too quick and the dye isn't fully finished I used a superdrug early predictor I found them very accurate try one of those ones x