Oo mama, totally normal yan! I was super tired around that time din, parang deadweight ang katawan ko kahit pumauwi lang from work, a few of us moms dine-describe yan as pregnancy fog talaga, kaya don't worry haha. Check with your OB pa rin para sure kung okay ang iron levels mo at lahat, pero most likely it's just your body working overtime to support baby, plus hormones pa lang. Drink lots of water, get rest when you can, at don't push yourself too hard, that first trimester exhaustion is legit! How are you doing otherwise?