AM I PREGNANT PLEASE HELP ?

ok so i am 4 days late for my period and i took a clearblue digital test and it said negative so i bought a clearblue plus and it also said negative but when i opened up the clearblue PLUS +.. it had a line to show the test had worked and a line like this - in the test window when i looked closer they was a very very faint blue line going down like this | when i looked in really good light i could see the + sign could i be pregnant but testing to early or am i just wishful thinking ?? advice please not sarcastic comments ive been trying to get pregnant for months :( ... thank you in advance...