Digi test question!

[Ichisan]

Hello ladies, We are in our 4th month of TTC and Ive been feeling odd for the past week so did a Boots own digi test this lunchtime (even though Im not due AF till mon) and it was positive. Is this likely to be accurate? I did a cheap blue dye yesterday and the day before with FMU and thought I saw a faint cross but after reading about how unreliable blue dye tests are Im seriously doubting all results!
Thanks for indulging my test paranoia ladies