Pregnant?

How soon is too soon to take a pregnancy test? I've been having regular unprotected sex with my boyfriend for a little over a month. Normally we use the pull out method if it's my ovulation week but let's say things got away from us and he came inside me. A couple days after glow said my period was supposed to be here I had the lightest spotting ever (I wouldn't of noticed if I hadn't worn white underwear). Im just over two weeks late and I'm starting to worry