Tested tonight at 8dpo because why the hell not? And it looked negative after a couple of minutes so I put it on the side and had a bath - then after 20 minutes or so there is a v v faint positive line. I've tried to take a picture but I'm not sure it's visible - but what do you think? Bfp or evap? I think the line is pink rather than grey but it's so light it's really hard to tell.