Aches and Pains

Whitney
Hey guys! I'm almost 5 weeks into my first pregnancy, so I don't really know what's normal and what isn't. I don't have morning sickness yet, but i do feel like I have been hit by a truck. My whole body hurts. My back, my ribs, my abdomen, my legs. I just ache, kind of like the flu. Could this be from fatigue or all the work my body is doing? Is it normal??