I used to worry if sleeping too much would affect the baby, but fatigue is so normal. Just try to take small, frequent rests, and definitely don't push yourself too hard because stress is the last thing you need right now.
Extreme tiredness can sometimes be due to fluctuating thyroid levels, which happened in my case. Please ask your doctor for a complete blood count and thyroid panel to make sure everything is balanced.
When I was staying at my mom's place, she used to make me fresh coconut water and light khichdi to help with the low energy. Having family around to pamper you and handle the kitchen really helps you get that much-needed afternoon nap.
With twins, my fatigue was on another level, like I could sleep standing up. Honestly, just surrender to the bed whenever you can and let your husband handle the chores. There's no medal for pushing through!
During my first trimester, I felt so useless because I was sleeping 12 hours a day and still exhausted. I felt like crying sometimes, but then I realized my body was literally growing a whole human.