Am I pregnant?

Arielle
I'm 4 days late (according to glow). 
I was supposed to get my period on Monday. I took a pregnancy test the Saturday before and it was negative. It's now Thursday and no period, no spotting, no breast tenderness.  So I took 3 more tests tonight. The first one was a faint positive. The 2nd two were negative. 
What do you think?