Try eating more green leafy vegetables like spinach and lettuce. If you've hit your secons trimester you may be slightly low on iron which causes that. You OB can check you and give you iron if needed.
Hi there ! I was like that for my 11th and 12th week gosh so annoying like i had run a marathon ! Try light very light yoga. Breathing strentching (careful go on youtube for a first trimester prenatal yoga) try only to breathe. A session of yoga it s like a nap :)
I was the same way in the beginning of my pregnancy. I wanted to sleep and sleep. All I can say is take it easy and it gets better. Thankfully in my second trimester the fatigue and nausea are almost gone.