Taking birth control and now having VERY bad cramps and very upset stomach?

This has been a bit of a nightmare. I started taking YAZ on September 29th until now so almost a month it will be. The second week of taking it i would get these squeezing cramps. They were very annoying and would just come and go. So i figured ok this is normal i guess. Then the following days i suddenly got upset stomach like not to be nasty but very foul smelling gas and bowel movements. And i just umed maybe it was something i ate. Well ever since last sunday (maybe even before that because i was spotting quite a bit) i started bleeding full on. As time went on it got heavier and heavier to where now i am going through tampons ridiculously and i even had to where both those and pads. Now i have developed these HORRENDOUS cramps. To the point where they're crippling at times and now i have to take ibuprofen 600 mgs every 6 hours (sometimes 5 because the pain comes back sooner at times) or else it is unbearable. And low and behold my upset stomach has not gone away. It seems to me that the horrible cramps tend to subside A LITTLE when i go to the bathroom but i barely go much when i go and it seems like i am constipated. I'm trying to make a appointment with planned parenthood to possibly get off of this pill. For some reason it seems to me that this pill is the blame for my stomach spazzing completely out. What does everyone else think? Should i stop taking YAZ? I been prescribed by my mom's doctor with these pills because my period became very irregular.