Pregnant and stressed. Love babies but can't stop work to go on bedrest like last pregnancy?

Tough Choices. Unfortunately, maternity exposes women to choices men never have to consider. Try to negotiate your situation with your support system. Hopefully, your boss can be understanding of your situation.
Nutrition. Best thing you can do is make sure you get adequate nutrition during pregnancy. I recommend to my patients a whole-foods, plant-based diet. Beyond that, many things occur as hormones flucuate, including low energy levels, but you did not mention why you needed to go on bedrest last time. Check with your obgyn, and consider using someone versed in nutrition as well.