Please Help

I am not sure what to think at this point. I have a pretty normal cycle that runs about 28 days. My last period started on March 27, 2010. I noticed it was a lot lighter then normal; the color was lighter as well. I experienced less cramping and a rather short period. I usually run anywhere from 5-7 days with extreme cramps and heavy clotting the first few days. I did not experience anything like that. I did not think much of it at the time but on my 19 day of my cycle I started spotting a very light pinkish color in the morning, and then that night started bleeding I have been experiencing the same kind of bleeding like I did last month only a week and a half earlier then my period should be. I stopped bleeding last night, but it was the same like a brighter red/pink, no clots, very light cramps, only less then 4 days in length. I have noticed I have been very tired the last few weeks, also having some trouble eating, certain foods make me want to vomit. I also noticed what seem to be gas bubbles in my lower abdomen, I have never felt anything like them, and they come and go. I have never experienced anything like this in my cycle. Any thoughts on what could be going on???