Likelihood of not being pregnant?

Hello all,
I know I am crazy, but I just can't believe I am really pregnant! My period is supposed to come today or tomorrow, I've had mild cramping for about a week and feel like I'm "leaking", or starting to bleed , but when I go to the bathroom it's just a little darker than normal on the toilet paper with clear discharge, not  blood. 
I have had 7 dark positive home pregnancy tests since Monday, and one positive blood test yesterday. 
Since I haven't technically missed my period yet, is it for sure I really am pregnant??
My fiancé knows and we are both so so happy about it - I'm just so terrified I'm going to go to the bathroom and there will be my period!