College & Pregnant

I am in my first semester of college and im realizing this pregnancy is kicking my butt. No matter how hard I try I am always sleepy, I find myself oversleeping my classes and then im falling behind on my work because im either feeling sick or as soon as I try to do work im falling asleep again. It's like I try to fight it but my body always wins. It sucks because im young and I want to show my parents that this pregnancy won't stop but it's so hard and my grades are starting to slip. Anyone found a way around it or have any advice ? Btw I'm a Nursing major I don't have room to slack so it makes it worst