I am currently 37 weeks pregnant and 5 days, this is my first pregnancy, for about the past three days, I feel so tired its hard for me to literally do anything. I feel like I m in slow motion, I move very slowly, I feel weak, very emotional, and extremely tired, no matter how much rest I get, I also have noticed today I feel very thirsty. Is this normal at this stage of pregnancy? Or is something wrong? I almost have flu like symptoms but no flu. Constant headache , and achy body and extremely tired. What could this be?