I am I Pregnant? or Being Paranoid?

OK so I've been spotting since sunday may 9th, 2010 on wednesday I bleed a bright neon pinkish red, & it was medium heavy not like a normal period, there were no clots though? other then that the rest of the week I've been spotting very light brown & pink discharge, & recently my stomach as been hurting for the past 2 weeks, yes me & my husband have had unprotected back in april 25th-28th my ovulation days, my period isn't due until tomorrow, so thats when ima take a pregnancy test but I want to know qhat you all think? whenever I Exhale & my stomach expands further out thats when it hurts & feels sorw, oh & I havent had any symptoms besides eating, appetite change, & I smell stuff when im not even near it, im always tired, & I get headaches that are painful.