CLEARBLUE DIGITAL TEST PLEASE HELP ... ?

IAM 4 DAYS LATE FOR MY PERIOD AND HAVE TOOK 2 TESTS AND ALL HAVE BEEN NEGATIVE BUT WITH A VERY VERY FAINT LINE WHICH COULD JUST BE AN EVAPORATION LINE.. I TOOK A CLEARBLUE DIGITAL THIS MORNING AND IT READ NOT PREGNANT SO I OPENED IT UP. INSIDE IT HAD 2 WHITE STICKS.. ON ONE IT HAD 2 LINES A DARK ONE AND A VERY VERY LIGHT LINE AND ON THE OTHER STICK IT JUST HAD 1 VERY VERY LIGHT BLUE LINE.. COULD THIS BE POSSITIVE BUT TO EARLY TO TEST OR AM I JUST WISHFUL THINKING ?? HELP WOULD BE APRRECIATED...