getting the feelings far more & far worse than before?

I have been having symptoms of pregnancy, but I took a pregnancy test at home and one at the doctors office and they were negative, but I'm getting the feelings far more & far worse than before. My period is supposed to come tomorrow, but I don't feel I normally do the day before my period. Also my pelvic area is very hard lately. My head hurts badly and I'm having intense mood swings. Could I be pregnant?