Ive ben the same way
With this pregnancy im now 25 wks and babys greysen is still healthy
It really just depends i got rold my morning sickness would go away and thats still right here lol so i think you fine its just how your body is handling the baby
Was your first trimester blood test ok? Maybe your iron is low, you have anemia. Or you could be developing high sugar in blood.
I was like that in my second trimester, my feet were swollen.. It turned out I had gestational diabetes. After being diagnosed, I started a diet and exercise and I've been feeling just great! More energy than before getting pregnant :)
Anyways, talk to your doctor about it.
Here's some advice from MedHelp.org and the I'm Expecting app on Fatigue. Usually people start to feel less tired in the second trimester, but everyone's pregnancy is different!
http://www.medhelp.org/pregnancy-health/articles/Fatigue-and-Insomnia-During-Pregnancy-Your-Symptoms-Manual/1986
You can check the week you're in and see how common this symptom is. Find this in the app by going to the Pregnancy Diary from the home screen and selecting Fatigue from the Symptoms menu. Then click the menu bar in the upper left and select Symptoms Manual to see your symptoms.