pregnant?

Okay I'm 8 days late. I've had unprotected sex a few times this month but we use the withdrawal method.. I've tested 3 times on 3 different tests. Clear blue and a cheap $0.88 one came back negative.. when I took a first response one there was a faint line for like 30secomds and then It disappeared.. is it to early to test or am I just not pregnant?? I'm so confused because my periods have been normal on the clock for the past 5 months. ( weaned my daughter from breastfeeding) & with my pregnancy of my daughter my test came back positive before a missed period?? I know every pregnancy is different. Had anyone else had similar events occur