It’s common to feel lethargic and having all the morning sickness during first trimester. There are cases where preg women doesn’t have this kind of symptoms (envy much). When I was carrying my first one, I have morning sickness. Now this second one also the same and the lethargic is worse than my first pregnancy - I can sleep for the whole day and still feel extremely tired. Usually it will get better in the second and third trimester for most of the preg woman. Minority will have morning sickness throughout the whole pregnancy. If your work allow you to wfh, probably you can talk to your boss and make some arrangement for you to wfh? Try talking out with your boss first.