I am exactly the same. My periods are 3 days late when usually regular. I tested negative first thing this morning with a Superdrug test. I am going to wait a couple of days then test again with First Response. I remember this being the first one to show positive when I was pregnant with DD. Are you getting any other symptoms? I almost wish my period would show now so I stop imagining the cramps, constipation and sore boobs means anything more than PMS. Good luck for your test.
I did a clearblue too on Thursday. It was negative. It is my first month ttc so I really did'nt expect much. I feel my body is messing with my head. My periods are never late. 29 day cycle and always start in the morning. Timepasses - I am going to try and wait until Tuesday. Though I did notice the pound shop had 2 for 99p!! I could test every hour at those prices