"i hate this birth control!!! i used to be on ortho tricyclone lo and i loved, never had any side effects or problems. i was switched to tri prevfiem 3 months ago and it has been awful from day one. i have severe headaches from the beginning of my period to the end. i&#039;ve gained 10lbs. i have had a yeast infection every month since i&#039;ve been on it. (i&#039;ve never had yeast infections before). my mood swings are ridiculous. i never want to have sex. the list goes on. do not get this birth control!"