I've felt like that, drink Gatorade.
I thought that i might be dehydrated but i dont drink anything but water or dilute juice ....and i usually drink more than the recommended amount as i dont have anything else like tea coffee or pop. My wee isnt dark either so wondered if there was anything else....ive had growing pains past week or two but not really bad....
Ive felt like that and im 14 weeks too. Right now i have a head ache but i havent drank water because im in school and iforgot to bring some. Ur probably dehydrated