am I pregnant?

this is my first time on here. I'm also experiencing light pink watery discharge. my last period was 4/26/12, I was expecting my next period 5/26/12 but now I'm a week and two days late. I took a pregnancy test 5/30/12 and 6/2/12, they both came out negative. I started experiencing the light pink watery discharged yesterday morning and yesterday afternoon I started to feel cramps, at first I thought nothing of it but the cramps started to get more intense. am I pregnant? I've been experiencing a few pregnancy symptoms like: missed period (obviously), fatigue, frequent urination (every hour), breast feeling fully and a little tender, and some abdominal pain. and yesterday night I couldn't sleep because it felt like my body was ran over by a run away train. this morning I woke up and use the restroom and still was experiencing the light pink watery discharge but this time with little blood clots and the color was a light brighter in color (a little more redish). this isn't normal for me and I'm a bit worried. my cycle is 28-30 days, usually I have severe cramping and a heavy flow that last about 4 days. can I be pregnant?