The best thing for your body now is plenty of sleep and rest! When I have some energy, I would go for a walk and some exercise (as tolerated). That usually makes me more energetic. You will feel better in second trimester!
Eat abit all the time.. Drink water.. Plenty of bed rest... But head out for some sun once in awhile. I was weak too til i dont even want to dress up. Its okay. This too shall pass.
Take brewed ginger water to alleviate the nausea. U can try taking hot Milo or milk to boost up your energy if u have poor appetite for solid food.
During my first trimester, I had no appetite. All i wanted was milo & biscuits/bread. Forced myself to eat small meals.
Try to get honey ginger will make u feel better for nausea symptom.
Milo and plain crackers
Take more rest
Nurul