Unsurprisingly the picture I'm able to get doesn't really show the line well but in person it's definitely there.
It's probably an evap, right? Is a line at 6dpo even possible? I'm sure I'm 6dpo today and definitely couldn't be any later as DH and I only managed to DTD on the day of ovulation.
I'm definitely nuts to test at 6dpo, I did because my chart looked so promising with consistently high temperatures which is a pattern I've not seen before.