hi lili, yep, all normal for the first trimester or so, imagine all that extra work your body is doing, creating that little miracle from you, all that extra blood and ALL those hormones!
get lots of rest (easier said than done I know!) I couldnt have survived pregnancy without my nanna naps, the second trimester will be here before you know it, and you should hopefully start to feel a bit more "normal" well, have a bit more energy anyway!
if you are concerned maybe get your doc to check your iron levels, and keep up with the pregnancy vitamins.
wishing you a happy and healthy pregnancy! x