Birth Control Question

Hi ladies! I just got back on birth control (after being off for 10 years). I’m taking a pill, and I’m only on my 5th day of the pill! I swear within 4 hours after taking it - I am EXHAUSTED and SO nauseous and yesterday I was just straight bitchy. I didn’t have a good experience with the pill years ago, and I’m feeling the same way again. Am I in a funk or could this be the pill? And if it’s the pill, should I continue or what would happen if I just said screw it and stopped taking it and took other precautions? I wasn’t sure if it’s in my system enough to affect anything. Any advice is appreciated!