Can I trust this??

Kayleigh • Newlywed!! Expecting our first!! Baby under construction expected completion 29th August 2016 :) :) 💙💗
So yesterday I was 8dpo and I tested and I'm a sod for waiting the full 2-3 minutes so the first line came up to show it was working and  my friend came over so I totally forgot about it. Cleaning my bathroom today I noticed a very faint line on the strip. I've run out of tests untill I go to store tomorrow. Do you think i should trust it? I don't want to get my hopes up! Xxx