so confused!

My fourth month of trying after being off of birth control. I am 4 days past my expected period... took two clear blue tests and had a faint line on both! But then I take the clear blue digital one - one yesterday and one this morning and they both say negative. What the heck!!! But still no period... I've never had a issue with being on time. Anyone else have this happen and if so we're you indeed pregnant?