Two days late for my period.. I am a right on time girl.. I took a pregnancy test this morning (2nd day late) and it came out negative.. But I have been feeling like "I'm on my period" but have yet to bleed. Back pain, really gassy, light to moderate cramping that comes and goes, boobs and nipples are sore I do believe my nipples to be darker than normal, occasional diarrhea, trouble sleeping at night...HELP! Am I pregnant? Did I test too soon? Or does this sound like something else?