negative side effects?

has anyone had any negative side effects when taking the pill? im scared mine isn't safe for me. i don't know if it's all in my head but i recently just got back on bc today and i feel like i can't breathe. i had complications with the last ones i was taking but the side effects faded away. which was good.. but im more concerned this time around. even though it's the same brand. ive researched and all i could find was horrifying stories about being on bc. am i being too paranoid? or go back to my dr at least?