Pregnant or is/was it just a period?

My period isn't suppose to come for another week but on May 2 which was 11 days before my period is due and approximately 17 days after my last period and I have always been regular with a 28 day cycle, well on May 2nd I started bleeding and having cramps, I thought it was my period at first but to begin with, it was very light like a brownish/pinkish color and it only showed up on a pad and toilet paper but there was none in the toilet. Two days later it gotten a little darker and a little more but still nothing in the toilet only toilet paper and pad and now it is extremely light and only shows up on toilet paper. I'm usually very heavy during my period. I have also been cramping and still am cramping as if my period is here. I've taken my temperature, not with a bbt thermometer but with a regular one and I have been in the mid 98's when my normal temperature on a regular thermometer is in the mid 97's.

I have also been feeling nauseated. last night I thought I was actually going to throw up and I think I have even gained a lil weight because my fiancee who doesn't know there's a possibility I could be pregnant, keeps calling me "preggo" i know that sounds petty but could that be a sign that maybe I am? Another thing is, I drink tea quite often but today when I was drinking it I thought I was going to puke, not that it wasn't good cuz it was. Could I be pregnant or is it just my mind playing tricks on me? Also my nipples/breasts have also been extremely sensitive to the touch