Tiredddddd

Hi everyone ! I’m 6 weeks and 6 days pregnant with my 3rd child . My other two are 11 and 5 years of age.. While pregnant with them I’ve never experienced so much “tiredness” as I do now. I do not have energy to even get out of bed and it really is making me feel depressed. My husband is a big help with our other children but I feel lazy and like I’m not contributing. I can literally wake up to bring my kids to school at 8am, come home and sleep for 3 hours, wake up straighten my living room , then take another 3 hour nap . Pls tell me this is normal ? I am currently not working but I really want to... then again I don’t even have the strength to work from home at my desk .. wtheck is wrong with me !? I don’t have my first doc appt til the 25th