any chance i could be pregnant? HELP!

A few weeks ago i got this weird feeling that i was pregnant, something that i have never had before. I didn't really think anything of it..then i got what i guess was supposed to be my period, only one week early. It wasn't my normal period. it was very light and not really there. I had this for like 5 days. Also along with this bleeding, i had headaches, backaches, felt sick to my stomach and was always hungry but could not always eat cause i would feel like i was going to get sick. I know that these are all signs of pregnancy so i took a pregancy test, pretty sure it was too early though and it came out negative. Since then, the bleeding has stopped for the most part, but it does happen a little every once and awhile. I am still not late for my period, i am supposed to get it wednesday. So i was wondering what the chances are that i am pregnant and what i should do. I really need some advice, my boyfriend and i are so confused. Anyone please write back, i would really appreciate it. THANKS!