late af but no BFP!! advice !?

hey guys ! im currently almost 2 1/2 years TTC and AF was expected April 6 but hasnt shown up yet ! I took two test, one at 2 weeks late and one at 4 weeks late but were negative :( I'm calling dr tomorrow to make an appt for blood test but wanted to hear from the ladies here. My hopes are high but im not sure if they should be ! do you think af is really late or do you think i will finally get my BFP !!?!?