Hey mamas, I need some help with a question real quick. I had my baby almost 2 months ago, got on…

Hey mamas, I need some help with a question real quick. I had my baby almost 2 months ago, got on the birth control pill and I'm almost done with my first month of it. Since yesterday I've been getting really bad headaches, will feel dizzy, have this nauseous feeling, body feels really off, and my moods can go from happy to a second later I'm zoning off and feel sad then back again. My question is, could I possibly be pregnant again? Or do you ladies think it's just my birth control messing with me since I'm almost done with it? Just wanted to know what you mamas think. Thank!