pelvic and abdominal pain

For the last 5 days I have been experiencing abdominl and pelvic pains.  At first I just thought I was full of gas but going to the washroom didn't help at all.  The pain started in my upper abdominal, right where the two sides of my ribcage join together, then it moved to my lower abdominal, and now the pain is mainly focused in my pelvic are.  I am not to worried about this because the pains not that bad most of the time, but sometimes it really hurts.  When I last went pee the pain I got in me pelvic area was awful, it felt like my pelvic bone was cranking (obviously not that extreme, but that's what I immediately thought of when I felt it).  

Yeah, I just really wont to figure out what it could be the constant stabbing pains every so often have started to put me in a bad mood but I don't really feel like its a big enough deal to go the the doctor about.

Thanks for your help,

Kira