I've been in college for four years now, switched my major street first year so I will graduate end…

I've been in college for four years now, switched my major street first year so I will graduate end of 2016, I take most of my classes online so that I can still go to work be a mom and a good wife but this pregnancy is completely draining me, I leave work early almost every day because I'm either to sick or falling asleep at my desk... I just can't believe how exhausted I am! anyways ladies any tips on natural way to get more energy they said second trimester ill get a burst of energy but hey its not coming lol I take vitamin b in the morning as well