Am I pregnant?

I took two first response tests they were very faint positive lines. I took a clear blue digital test and got "pregnant" that was with my second pee. A few hours later and a lot of restroom breaks later I took another one to be sure and it said " not pregnant " so I ended up going to planned parenthood and they said it might not be accurate since it hasn't been two weeks,AFTER I already paid. Those results were negative. Has anyone had a false positive on clear blue digital test? My period isn't for another 6 days.