TTC can you get a false positive

Hey, 
I've been trying to fall pregnant for a year now and my period is 3 days late 
I bought a Superdrug digital pregnancy test and one said negative I didn't read the instructions properly so I done another test and it said positive so I tried another test to confirm it and it said negative.
Can it be possible to have had a false positive? I'm so confused and I'm tired of getting my hopes up for it to be shattered to pieces.