If it requires for you to get more rest for the benefit of you and baby why not? Everyone be it pregnant or sick requires rest time to recuperate. Atleast tell them what you are facing as of now and your wish to change slight work schedule if it is permissable or lessen little workload or alternate days of WFH. For my first and second pregnancy I had different symptoms. First child I reduce working hours and be home on time. Having said that, I will swap shift with my partner or take MC if needed. While the second child, my first trimester I was in hospital due to inconsistent fever and I can't urine. I had to stop working due to medical reason. My company totally understood that and had to agree to my decision. They even told me they will welcome me back when I'm all ready to resume work again.
Hope this suggestion would help you. Remember health is important, should anything happened to you, no one gonna be reliable except your company for not understanding pregnant Mummy.
One thing for sure, we are not taking advantage, but all pregnancy is different. Don't compare each every women. The least they can do as a human is to understand.
Virtual hugs and dont stress yourself 🤗