Please help!

Okay so I started birth control over 3 months ago and I'm having awful side effects. My cramps during my period are worse and my entire digestive system is thrown off before and during my period. It is so uncomfortable and this has never been apart of my period before. I have also had yeast infection around the same time every month- which is the worst. I have heard they can happen because of the hormones in the pills. I am also very emotional, which may or may not be a side effect but I have noticed that I cry more for little reasons. I can't keep doing this. I can't get pregnant but this is too much too handle I just don't feel healthy anymore. I told my doctor that I wanted to try and switch pills because of the yeast infections and she said "it's normal". This is not normal. I don't know what to do, should I stop taking it and rely on pull out/condoms?? By the way I am on ortho cyclen- previfem.